{"id":"CVE-2025-21610","aliases":["EUVD-2025-0029","GHSA-j386-3444-qgwg"],"status":"published","title":"Trix allows Cross-site Scripting via `javascript:` url in a link","description":"Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Versions prior to 2.1.12 are vulnerable to cross-site scripting when pasting malicious code in the link field. An attacker could trick the user to copy\u0026paste 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. Users should upgrade to Trix editor version 2.1.12 or later to receive a patch. In addition to upgrading, affected users can disallow browsers that don't support a Content Security Policy (CSP) as a workaround for this and other cross-site scripting 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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00421,"percentile":0.36915,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2025-01-03T16:29:54Z","modified":"2026-10-28T02:30:28Z","fixes":[{"ecosystem":"npm","package":"trix","fixed_in":["2.1.12"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"trix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.12"}]}]},{"source":"osv","ecosystem":"npm","package":"trix","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.1.12"}]}]}],"products":[{"vendor":"basecamp","product":"trix"}],"references":[{"url":"https://github.com/basecamp/trix/security/advisories/GHSA-j386-3444-qgwg","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/basecamp/trix/commit/180c8d337f18e1569cea6ef29b4d03ffff5b5faa","tags":["x_refsource_MISC","fix","web"]},{"url":"https://github.com/basecamp/trix/commit/c4f0d6f80654603932af6685694f694e96593b93","tags":["x_refsource_MISC","fix","web"]},{"url":"https://gist.github.com/th4s1s/3921fd9c3e324ad9a3e0d846166e3eb8","tags":["x_refsource_MISC","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21610","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j386-3444-qgwg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21610.json","tags":["advisory"]},{"url":"https://github.com/basecamp/trix","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-21610","title":"Trix allows Cross-site Scripting via `javascript:` url in a link","description":"Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Versions prior to 2.1.12 are vulnerable to cross-site scripting when pasting malicious code in the link field. An attacker could trick the user to copy\u0026paste 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. Users should upgrade to Trix editor version 2.1.12 or later to receive a patch. In addition to upgrading, affected users can disallow browsers that don't support a Content Security Policy (CSP) as a workaround for this and other cross-site scripting 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.","status":"published","published":"2025-01-03T16:29:54.939Z","modified":"2025-01-03T16:56:23.301Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:32.702673Z"}],"euvd":[{"id":"EUVD-2025-0029","description":"Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Versions prior to 2.1.12 are vulnerable to cross-site scripting when pasting malicious code in the link field. An attacker could trick the user to copy\u0026paste 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. Users should upgrade to Trix editor version 2.1.12 or later to receive a patch. In addition to upgrading, affected users can disallow browsers that don't support a Content Security Policy (CSP) as a workaround for this and other cross-site scripting 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.","status":"published","published":"2025-01-03T16:29:54Z","modified":"2025-01-03T16:56:23Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:26.497295Z"}],"ghsa":[{"id":"GHSA-j386-3444-qgwg","title":"Trix allows Cross-site Scripting via `javascript:` url in a link","description":"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\u0026paste 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","status":"published","published":"2025-01-03T16:29:58Z","modified":"2025-01-03T19:26:15Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:38:26.167657Z"}],"nvd":[{"id":"CVE-2025-21610","description":"Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Versions prior to 2.1.12 are vulnerable to cross-site scripting when pasting malicious code in the link field. An attacker could trick the user to copy\u0026paste 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. Users should upgrade to Trix editor version 2.1.12 or later to receive a patch. In addition to upgrading, affected users can disallow browsers that don't support a Content Security Policy (CSP) as a workaround for this and other cross-site scripting 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.","status":"published","published":"2025-01-03T17:15:09.29Z","modified":"2026-06-17T08:43:50.98Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:10:48.373347Z"}],"osv":[{"id":"CVE-2025-21610","title":"Trix allows Cross-site Scripting via `javascript:` url in a link","description":"Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Versions prior to 2.1.12 are vulnerable to cross-site scripting when pasting malicious code in the link field. An attacker could trick the user to copy\u0026paste 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. Users should upgrade to Trix editor version 2.1.12 or later to receive a patch. In addition to upgrading, affected users can disallow browsers that don't support a Content Security Policy (CSP) as a workaround for this and other cross-site scripting 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.","status":"published","published":"2025-01-03T16:29:54.939Z","modified":"2026-10-28T02:30:28.108554831Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:46.665428Z"},{"id":"GHSA-j386-3444-qgwg","title":"Trix allows Cross-site Scripting via `javascript:` url in a link","description":"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\u0026paste 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","status":"published","published":"2025-01-03T16:29:58Z","modified":"2025-01-03T19:26:14Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:49.977351Z"}]}}