{"id":"CVE-2026-22254","aliases":["EUVD-2026-5618","GHSA-m7gw-rffq-rxjm"],"status":"published","title":"Winter Affected by Stored Cross-Site Scripting (XSS) in Asset Manager","description":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.","severity":{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N","level":"none","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00286,"percentile":0.21321,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79","CWE-80"],"published":"2026-02-04T21:32:39Z","modified":"2026-10-28T02:31:06Z","fixes":[{"ecosystem":"Packagist","package":"winter/wn-cms-module","fixed_in":["1.2.10"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"winter/wn-cms-module","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.2.9"},{"fixed":"1.2.10"}]}]},{"source":"osv","ecosystem":"Packagist","package":"winter/wn-cms-module","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.10"}]}],"versions":["v1.0.473","v1.0.474","v1.0.475","v1.1.10","v1.1.11","v1.1.2","v1.1.3","v1.1.4","v1.1.5","v1.1.6","v1.1.7","v1.1.8","v1.1.9","v1.2.0","v1.2.1","v1.2.2","v1.2.3","v1.2.4","v1.2.5","v1.2.6","v1.2.7","v1.2.8","v1.2.9"]}],"products":[{"vendor":"wintercms","product":"winter"}],"references":[{"url":"https://github.com/wintercms/winter/security/advisories/GHSA-m7gw-rffq-rxjm","tags":["x_refsource_CONFIRM","Patch","Vendor Advisory","advisory","web"]},{"url":"https://github.com/wintercms/winter/commit/8a7f74b004fcd19721764fc63af0cdb339d9fb65","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/wintercms/winter/releases/tag/v1.2.10","tags":["x_refsource_MISC","Product","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22254","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m7gw-rffq-rxjm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22254.json","tags":["advisory"]},{"url":"https://github.com/wintercms/winter","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-22254","title":"Winter Affected by Stored Cross-Site Scripting (XSS) in Asset Manager","description":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.","status":"published","published":"2026-02-06T19:11:27.26Z","modified":"2026-02-09T15:28:17.194Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N","level":"none","assessor":"cna"}],"cwes":["CWE-79","CWE-80"],"updated_at":"2026-11-02T13:39:05.585774Z"}],"euvd":[{"id":"EUVD-2026-5618","description":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.","status":"published","published":"2026-02-06T19:11:27Z","modified":"2026-02-09T15:28:17Z","updated_at":"2026-11-02T19:48:42.465921Z"}],"ghsa":[{"id":"GHSA-m7gw-rffq-rxjm","title":"Winter CMS has Stored Cross-site Scripting (XSS) in Asset Manager","description":"## Impact\nAffected versions of Winter CMS allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization.\n\nTo actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: `cms.manage_assets`\n\nThe Winter CMS maintainers strongly recommend that the `cms.manage_assets` permission only be reserved to trusted administrators and developers in general.\n\n## Patches\nSanitization of SVG assets is now applied automatically when uploading through the CMS Asset Manager.\n\nThis security issue has been fixed as of https://github.com/wintercms/winter/commit/8a7f74b004fcd19721764fc63af0cdb339d9fb65.\n\n## Workarounds\nIf users cannot upgrade, they may apply commit https://github.com/wintercms/winter/commit/8a7f74b004fcd19721764fc63af0cdb339d9fb65 to their Winter CMS installation manually to resolve this issue.","status":"published","published":"2026-02-04T21:32:39Z","modified":"2026-02-06T21:42:10Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:39:23.728882Z"}],"nvd":[{"id":"CVE-2026-22254","description":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.","status":"published","published":"2026-02-06T20:16:10.057Z","modified":"2026-06-17T10:19:38.58Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N","level":"none","assessor":"secondary"},{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79","CWE-80"],"updated_at":"2026-11-02T14:12:05.52517Z"}],"osv":[{"id":"CVE-2026-22254","title":"Winter Affected by Stored Cross-Site Scripting (XSS) in Asset Manager","description":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.","status":"published","published":"2026-02-06T19:11:27.26Z","modified":"2026-10-28T02:31:06.304535268Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-79","CWE-80"],"updated_at":"2026-11-02T15:44:58.42038Z"},{"id":"GHSA-m7gw-rffq-rxjm","title":"Winter CMS has Stored Cross-site Scripting (XSS) in Asset Manager","description":"## Impact\nAffected versions of Winter CMS allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization.\n\nTo actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: `cms.manage_assets`\n\nThe Winter CMS maintainers strongly recommend that the `cms.manage_assets` permission only be reserved to trusted administrators and developers in general.\n\n## Patches\nSanitization of SVG assets is now applied automatically when uploading through the CMS Asset Manager.\n\nThis security issue has been fixed as of https://github.com/wintercms/winter/commit/8a7f74b004fcd19721764fc63af0cdb339d9fb65.\n\n## Workarounds\nIf users cannot upgrade, they may apply commit https://github.com/wintercms/winter/commit/8a7f74b004fcd19721764fc63af0cdb339d9fb65 to their Winter CMS installation manually to resolve this issue.","status":"published","published":"2026-02-04T21:32:39Z","modified":"2026-02-06T22:22:15.737027Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:51.463834Z"}]}}