{"id":"CVE-2026-27154","aliases":["BIT-discourse-2026-27154","EUVD-2026-8895","GHSA-xv43-5gcp-wgw8"],"status":"published","title":"Discourse has XSS when editing a malicious post","description":"Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` =\u003e true; and `prioritize_username_in_ux` =\u003e false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.","severity":{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00178,"percentile":0.07461,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-02-26T21:20:25Z","modified":"2026-10-28T02:31:11Z","fixes":[{"ecosystem":"Bitnami","package":"discourse","fixed_in":["2025.12.2","2026.1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"discourse","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2025.12.2"},{"introduced":"2026.1.0"},{"fixed":"2026.1.1"}]}]}],"products":[{"vendor":"discourse","product":"discourse"}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-xv43-5gcp-wgw8","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27154","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27154.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-27154","title":"Discourse has XSS when editing a malicious post","description":"Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` =\u003e true; and `prioritize_username_in_ux` =\u003e false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.","status":"published","published":"2026-02-26T21:20:25.181Z","modified":"2026-03-02T20:57:00.349Z","cvss":[{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U","level":"low","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:19:49.199185Z"}],"euvd":[{"id":"EUVD-2026-8895","description":"Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` =\u003e true; and `prioritize_username_in_ux` =\u003e false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.","status":"published","published":"2026-02-26T21:20:25Z","modified":"2026-03-02T20:57:00Z","cvss":[{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U","level":"low"}],"updated_at":"2026-11-02T19:48:12.247854Z"}],"nvd":[{"id":"CVE-2026-27154","description":"Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` =\u003e true; and `prioritize_username_in_ux` =\u003e false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.","status":"published","published":"2026-02-26T22:20:47.73Z","modified":"2026-06-17T10:26:46.323Z","cvss":[{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/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":"2026-11-02T14:12:07.027269Z"}],"osv":[{"id":"CVE-2026-27154","title":"Discourse has XSS when editing a malicious post","description":"Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` =\u003e true; and `prioritize_username_in_ux` =\u003e false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.","status":"published","published":"2026-02-26T21:20:25.181Z","modified":"2026-10-28T02:31:11.11704774Z","cvss":[{"version":"4.0","score":1.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U","level":"low"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:59.80315Z"},{"id":"BIT-discourse-2026-27154","title":"Discourse has XSS when editing a malicious post","description":"Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` =\u003e true; and `prioritize_username_in_ux` =\u003e false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.","status":"published","published":"2026-03-03T13:29:25.328Z","modified":"2026-09-10T16:01:30.963159901Z","updated_at":"2026-11-02T15:28:29.152062Z"}]}}