{"cve":"CVE-2026-63670","nvd":{"published":"2026-08-17T20:16:45.000","modified":"2026-10-23T16:10:00.313","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-79"],"references":["https://github.com/apostrophecms/apostrophe/commit/eae1fb2b72ec5d1c27d0977509c6482a0408f725","https://github.com/apostrophecms/apostrophe/pull/5501","https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw","https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-63670","score":0.00327,"percentile":0.25545,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-jxwj-j7wr-gfrw","url":"https://osv.dev/vulnerability/GHSA-jxwj-j7wr-gfrw","summary":"ApostropheCMS: Mutation-XSS / allowedTags bypass via literal `</textarea/>` solidus close","modified":"2026-09-03T20:15:05.883593916Z","packages":[{"ecosystem":"npm","name":"sanitize-html","purl":"pkg:npm/sanitize-html","ranges":["<2.17.6"],"fixed":["2.17.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}