{"id":"CVE-2025-21610","aliases":["GHSA-j386-3444-qgwg"],"url":"https://o3.security/vulnerability/CVE-2025-21610","summary":"Trix allows Cross-site Scripting via `javascript:` url in a link","details":"The Trix editor, versions prior to 2.1.11, is vulnerable to XSS when pasting malicious code in the link field.\n\n### Impact\n\nAn attacker could trick the user to copy&paste a malicious `javascript:` URL as a link that would execute arbitrary JavaScript code within the context of the user's session, potentially leading to unauthorized actions being performed or sensitive information being disclosed.\n\nSee https://gist.github.com/th4s1s/3921fd9c3e324ad9a3e0d846166e3eb8\n\n### Patches\n\nUpdate Recommendation: Users should upgrade to Trix editor version 2.1.12 or later.\n\n### Workarounds\n\nThis is not really a workaround but something that should be considered in addition to upgrading to the patched version. If affected users can disallow browsers that don't support a Content Security Policy, then this would be an effective workaround for this and all XSS vulnerabilities. Set CSP policies such as script-src 'self' to ensure that only scripts hosted on the same origin are executed, and explicitly prohibit inline scripts using script-src-elem.\n\n### References\n\nhttps://gist.github.com/th4s1s/3921fd9c3e324ad9a3e0d846166e3eb8\n\n### Credits\n\nThis vulnerability was reported by Hackerone researcher https://hackerone.com/lio346?type=user","published":"2025-01-03T16:29:54.939Z","modified":"2026-10-28T02:30:28.108554831Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"},"epss":{"score":0.00416,"percentile":0.34861,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"trix","fixedVersion":"2.1.12"}],"fix":{"url":"https://github.com/basecamp/trix/commit/180c8d337f18e1569cea6ef29b4d03ffff5b5faa","label":"basecamp/trix@180c8d3"},"references":[{"type":"WEB","url":"https://gist.github.com/th4s1s/3921fd9c3e324ad9a3e0d846166e3eb8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21610.json"},{"type":"ADVISORY","url":"https://github.com/basecamp/trix/security/advisories/GHSA-j386-3444-qgwg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21610"},{"type":"FIX","url":"https://github.com/basecamp/trix/commit/180c8d337f18e1569cea6ef29b4d03ffff5b5faa"},{"type":"FIX","url":"https://github.com/basecamp/trix/commit/c4f0d6f80654603932af6685694f694e96593b93"},{"type":"PACKAGE","url":"https://github.com/basecamp/trix"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:28.108554831Z"}}