{"id":"CVE-2024-53985","aliases":["EUVD-2024-3517","GHSA-w8gc-x259-rc7x","UBUNTU-CVE-2024-53985","openSUSE-SU-2026:10569-1"],"status":"published","title":"Possible XSS vulnerability with certain configurations of rails-html-sanitizer 1.6.0","description":"rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both \"math\" and \"style\" elements or both both \"svg\" and \"style\" elements. This vulnerability is fixed in 1.6.1.","severity":{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00633,"percentile":0.50797,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2024-12-02T21:15:57Z","modified":"2026-10-28T02:30:50Z","fixes":[{"ecosystem":"RubyGems","package":"rails-html-sanitizer","fixed_in":["1.6.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"RubyGems","package":"rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.6.0"},{"last_affected":"1.6.0"},{"fixed":"1.6.1"}]}],"versions":["1.6.0"]},{"source":"osv","ecosystem":"RubyGems","package":"rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.6.0"},{"fixed":"1.6.1"}]}],"versions":["1.6.0"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.2-1","1.0.3-1","1.0.3-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.3-2","1.0.4-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.4-1","1.3.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-2","1.4.2-1","1.4.2-2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.4-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.4-1","1.6.2-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.2-1","1.7.0-2","1.7.1-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"ruby-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.2-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"rubygem-rails-html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.0-1.1"}]}],"bundled":5}],"products":[{"vendor":"rails","product":"rails-html-sanitizer"},{"vendor":"rubyonrails","product":"rails_html_sanitizers"}],"references":[{"url":"https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-w8gc-x259-rc7x","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web","report"]},{"url":"https://github.com/rails/rails-html-sanitizer/commit/b0220b8850d52199a15f83c472d175a4122dd7b1","tags":["x_refsource_MISC","Patch","fix","web","report"]},{"url":"https://github.com/rails/rails-html-sanitizer/commit/cd18b0ef00aad1d4a9e1c5d860cd23f80f63c505","tags":["x_refsource_MISC","Patch","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-53985","tags":["advisory"]},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2024-53985.yml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-w8gc-x259-rc7x"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53985.json","tags":["advisory"]},{"url":"https://github.com/rails/rails-html-sanitizer","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2024-53985","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-53985","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2024-53985","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-53986","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-53987","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-53988","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-53989","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2024-53985","title":"Possible XSS vulnerability with certain configurations of rails-html-sanitizer 1.6.0","description":"rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both \"math\" and \"style\" elements or both both \"svg\" and \"style\" elements. This vulnerability is fixed in 1.6.1.","status":"published","published":"2024-12-02T21:15:57.62Z","modified":"2024-12-11T16:47:59.133Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:34:17.523201Z"}],"euvd":[{"id":"EUVD-2024-3517","description":"rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both \"math\" and \"style\" elements or both both \"svg\" and \"style\" elements. This vulnerability is fixed in 1.6.1.","status":"published","published":"2024-12-02T21:15:57Z","modified":"2024-12-11T16:47:59Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"updated_at":"2026-11-03T00:04:36.867108Z"}],"ghsa":[{"id":"GHSA-w8gc-x259-rc7x","title":"rails-html-sanitize has XSS vulnerability with certain configurations","description":"## Summary\n\nThere is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8.\n\n* Versions affected: 1.6.0\n* Not affected: \u003c 1.6.0\n* Fixed versions: 1.6.1\n\nPlease note that the fix in v1.6.1 is to update the dependency on Nokogiri to 1.15.7 or \u003e= 1.16.8.\n\n\n## Impact\n\nA possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags in either of the following ways:\n\n* allow both \"math\" and \"style\" elements\n* or allow both \"svg\" and \"style\" elements\n\nCode is only impacted if Rails is configured to use HTML5 sanitization, please see documentation for [`config.action_view.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-view-sanitizer-vendor) and [`config.action_text.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-text-sanitizer-vendor) for more information on these configuration options.\n\nCode is only impacted if allowed tags are being overridden. Applications may be doing this in a few different ways:\n\n1. using application configuration to configure Action View sanitizers' allowed tags:\n\n  ```ruby\n  # In config/application.rb\n  config.action_view.sanitized_allowed_tags = [\"math\", \"style\"]\n  # or\n  config.action_view.sanitized_allowed_tags = [\"svg\", \"style\"]\n  ```\n\n  see https://guides.rubyonrails.org/configuring.html#configuring-action-view\n\n2. using a `:tags` option to the Action View helper `sanitize`:\n\n  ```\n  \u003c%= sanitize @comment.body, tags: [\"math\", \"style\"] %\u003e\n  \u003c%# or %\u003e\n  \u003c%= sanitize @comment.body, tags: [\"svg\", \"style\"] %\u003e\n  ```\n\n  see https://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#method-i-sanitize\n\n3. setting Rails::HTML5::SafeListSanitizer class attribute `allowed_tags`:\n\n  ```ruby\n  # class-level option\n  Rails::HTML5::SafeListSanitizer.allowed_tags = [\"math\", \"style\"]\n  # or\n  Rails::HTML5::SafeListSanitizer.allowed_tags = [\"svg\", \"style\"]\n  ```\n\n  (note that this class may also be referenced as `Rails::Html::SafeListSanitizer`)\n\n4. using a `:tags` options to the Rails::HTML5::SafeListSanitizer instance method `sanitize`:\n\n  ```ruby\n  # instance-level option\n  Rails::HTML5::SafeListSanitizer.new.sanitize(@article.body, tags: [\"math\", \"style\"])\n  # or\n  Rails::HTML5::SafeListSanitizer.new.sanitize(@article.body, tags: [\"svg\", \"style\"])\n  ```\n\n  (note that this class may also be referenced as `Rails::Html::SafeListSanitizer`)\n\n5. setting ActionText::ContentHelper module attribute `allowed_tags`:\n\n  ```ruby\n  ActionText::ContentHelper.allowed_tags = [\"math\", \"style\"]\n  # or\n  ActionText::ContentHelper.allowed_tags = [\"svg\", \"style\"]\n  ```\n\nAll users overriding the allowed tags by any of the above mechanisms to include ((\"math\" or \"svg\") and \"style\") should either upgrade or use one of the workarounds.\n\n\n## Workarounds\n\nAny one of the following actions will work around this issue:\n\n- Remove \"style\" from the overridden allowed tags,\n- Or, remove \"math\" and \"svg\" from the overridden allowed tags,\n- Or, downgrade sanitization to HTML4 (see documentation for [`config.action_view.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-view-sanitizer-vendor) and [`config.action_text.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-text-sanitizer-vendor) for more information)\n- Or, independently upgrade Nokogiri to v1.15.7 or \u003e= 1.16.8.\n\n\n## References\n\n- [CWE - CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (4.9)](https://cwe.mitre.org/data/definitions/79.html)\n- Original report: https://hackerone.com/reports/2503220\n\n\n## Credit\n\nThis vulnerability was responsibly reported by So Sakaguchi ([mokusou](https://hackerone.com/mokusou)) and [taise](https://hackerone.com/taise).\n","status":"published","published":"2024-12-02T21:48:14Z","modified":"2024-12-03T18:50:30Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:38:24.542211Z"}],"nvd":[{"id":"CVE-2024-53985","description":"rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both \"math\" and \"style\" elements or both both \"svg\" and \"style\" elements. This vulnerability is fixed in 1.6.1.","status":"published","published":"2024-12-02T22:15:11.197Z","modified":"2026-06-17T08:09:37.073Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:10:38.973941Z"}],"osv":[{"id":"CVE-2024-53985","title":"Possible XSS vulnerability with certain configurations of rails-html-sanitizer 1.6.0","description":"rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both \"math\" and \"style\" elements or both both \"svg\" and \"style\" elements. This vulnerability is fixed in 1.6.1.","status":"published","published":"2024-12-02T21:15:57.62Z","modified":"2026-10-28T02:30:50.778826131Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:44.451316Z"},{"id":"GHSA-w8gc-x259-rc7x","title":"rails-html-sanitize has XSS vulnerability with certain configurations","description":"## Summary\n\nThere is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8.\n\n* Versions affected: 1.6.0\n* Not affected: \u003c 1.6.0\n* Fixed versions: 1.6.1\n\nPlease note that the fix in v1.6.1 is to update the dependency on Nokogiri to 1.15.7 or \u003e= 1.16.8.\n\n\n## Impact\n\nA possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags in either of the following ways:\n\n* allow both \"math\" and \"style\" elements\n* or allow both \"svg\" and \"style\" elements\n\nCode is only impacted if Rails is configured to use HTML5 sanitization, please see documentation for [`config.action_view.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-view-sanitizer-vendor) and [`config.action_text.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-text-sanitizer-vendor) for more information on these configuration options.\n\nCode is only impacted if allowed tags are being overridden. Applications may be doing this in a few different ways:\n\n1. using application configuration to configure Action View sanitizers' allowed tags:\n\n  ```ruby\n  # In config/application.rb\n  config.action_view.sanitized_allowed_tags = [\"math\", \"style\"]\n  # or\n  config.action_view.sanitized_allowed_tags = [\"svg\", \"style\"]\n  ```\n\n  see https://guides.rubyonrails.org/configuring.html#configuring-action-view\n\n2. using a `:tags` option to the Action View helper `sanitize`:\n\n  ```\n  \u003c%= sanitize @comment.body, tags: [\"math\", \"style\"] %\u003e\n  \u003c%# or %\u003e\n  \u003c%= sanitize @comment.body, tags: [\"svg\", \"style\"] %\u003e\n  ```\n\n  see https://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#method-i-sanitize\n\n3. setting Rails::HTML5::SafeListSanitizer class attribute `allowed_tags`:\n\n  ```ruby\n  # class-level option\n  Rails::HTML5::SafeListSanitizer.allowed_tags = [\"math\", \"style\"]\n  # or\n  Rails::HTML5::SafeListSanitizer.allowed_tags = [\"svg\", \"style\"]\n  ```\n\n  (note that this class may also be referenced as `Rails::Html::SafeListSanitizer`)\n\n4. using a `:tags` options to the Rails::HTML5::SafeListSanitizer instance method `sanitize`:\n\n  ```ruby\n  # instance-level option\n  Rails::HTML5::SafeListSanitizer.new.sanitize(@article.body, tags: [\"math\", \"style\"])\n  # or\n  Rails::HTML5::SafeListSanitizer.new.sanitize(@article.body, tags: [\"svg\", \"style\"])\n  ```\n\n  (note that this class may also be referenced as `Rails::Html::SafeListSanitizer`)\n\n5. setting ActionText::ContentHelper module attribute `allowed_tags`:\n\n  ```ruby\n  ActionText::ContentHelper.allowed_tags = [\"math\", \"style\"]\n  # or\n  ActionText::ContentHelper.allowed_tags = [\"svg\", \"style\"]\n  ```\n\nAll users overriding the allowed tags by any of the above mechanisms to include ((\"math\" or \"svg\") and \"style\") should either upgrade or use one of the workarounds.\n\n\n## Workarounds\n\nAny one of the following actions will work around this issue:\n\n- Remove \"style\" from the overridden allowed tags,\n- Or, remove \"math\" and \"svg\" from the overridden allowed tags,\n- Or, downgrade sanitization to HTML4 (see documentation for [`config.action_view.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-view-sanitizer-vendor) and [`config.action_text.sanitizer_vendor`](https://guides.rubyonrails.org/configuring.html#config-action-text-sanitizer-vendor) for more information)\n- Or, independently upgrade Nokogiri to v1.15.7 or \u003e= 1.16.8.\n\n\n## References\n\n- [CWE - CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (4.9)](https://cwe.mitre.org/data/definitions/79.html)\n- Original report: https://hackerone.com/reports/2503220\n\n\n## Credit\n\nThis vulnerability was responsibly reported by So Sakaguchi ([mokusou](https://hackerone.com/mokusou)) and [taise](https://hackerone.com/taise).\n","status":"published","published":"2024-12-02T21:48:14Z","modified":"2024-12-03T18:50:29Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:58.401149Z"},{"id":"UBUNTU-CVE-2024-53985","description":"rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails \u003e= 7.1.0 and Nokogiri \u003c 1.15.7, or 1.16.x \u003c 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both \"math\" and \"style\" elements or both both \"svg\" and \"style\" elements. This vulnerability is fixed in 1.6.1.","status":"published","published":"2024-12-02T22:15:00Z","modified":"2026-10-17T12:57:24.744537572Z","cvss":[{"version":"4.0","score":2.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","level":"low"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:55:15.331356Z"},{"id":"openSUSE-SU-2026:10569-1","title":"ruby4.0-rubygem-rails-html-sanitizer-1.7.0-1.1 on GA media","description":"These are all security issues fixed in the ruby4.0-rubygem-rails-html-sanitizer-1.7.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-04-17T00:00:00Z","modified":"2026-04-18T08:01:05.811659Z","updated_at":"2026-11-02T16:58:38.415593Z"}]}}