{"id":"CVE-2023-38500","aliases":["GHSA-59jf-3q9v-rh6g"],"url":"https://o3.security/vulnerability/CVE-2023-38500","summary":"By-passing Cross-Site Scripting Protection in HTML Sanitizer","details":"> ### CVSS: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C` (4.4)\n\n### Problem\nDue to an encoding issue in the serialization layer, malicious markup nested in a `noscript` element was not encoded correctly. `noscript` is disabled in the default configuration, but might have been enabled in custom scenarios. This allows bypassing the cross-site scripting mechanism of [`typo3/html-sanitizer`](https://packagist.org/packages/typo3/html-sanitizer).\n\n### Solution\nUpdate to `typo3/html-sanitizer` versions 1.5.1 or 2.1.2 that fix the problem described.\n\n### Credits\nThanks to David Klein and Yaniv Nizry who reported this issue, and to TYPO3 security team members Oliver Hader and Benjamin Franzke who fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2023-002](https://typo3.org/security/advisory/typo3-core-sa-2023-002)\n","published":"2023-07-25T20:59:53.135Z","modified":"2026-08-12T03:51:12.328400193Z","cvss":{"score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.00508,"percentile":0.41248,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"typo3/html-sanitizer","fixedVersion":"1.5.1"},{"ecosystem":"Packagist","name":"typo3/html-sanitizer","fixedVersion":"2.1.2"}],"fix":{"url":"https://github.com/TYPO3/html-sanitizer/commit/e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb","label":"TYPO3/html-sanitizer@e3026f5"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/38xxx/CVE-2023-38500.json"},{"type":"ADVISORY","url":"https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-59jf-3q9v-rh6g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-38500"},{"type":"ADVISORY","url":"https://typo3.org/security/advisory/typo3-core-sa-2023-002"},{"type":"FIX","url":"https://github.com/TYPO3/html-sanitizer/commit/e3026f589fef0be8c3574ee3f0a0bfbe33d7ebdb"},{"type":"PACKAGE","url":"https://github.com/TYPO3/html-sanitizer"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:12.328400193Z"}}