{"id":"CVE-2026-63670","revision":"91f37a92d5c94af094b1c04d5f7c0052","records":[{"revision":"91f37a92d5c94af094b1c04d5f7c0052","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63670","aliases":[],"title":"ApostropheCMS: Mutation-XSS / allowedTags bypass via literal `</textarea/>` solidus close","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 2.17.6, sanitizeHtml() can pass disallowed executable markup through packages/sanitize-html/index.js when textarea or xmp is included in allowedTags because a literal solidus after the raw-text end-tag name is treated as text by htmlparser2 and the ontext handler emits that content without escaping, while a browser parses the following img onerror markup as active HTML. This issue is fixed in version 2.17.6.","state":0,"publishedAt":"2026-08-17T19:49:51.903+00:00","modifiedAt":"2026-08-18T18:08:30.331+00:00","affected":[{"ecosystem":"Vendor product","name":"apostrophe","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"apostrophecms\",\n                    \"product\": \"apostrophe\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.17.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw","https://github.com/apostrophecms/apostrophe/pull/5501","https://github.com/apostrophecms/apostrophe/commit/eae1fb2b72ec5d1c27d0977509c6482a0408f725"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63670","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63670","identifiers":["CVE-2026-63670"]},"retained":false,"historicalAffected":[]}],"coverage":[]}