TYPO3-CORE-SA-2026-010: Cross-Site Scripting in Indexed Search
It has been discovered that TYPO3 CMS is vulnerable to cross-site scripting.
- Component Type: TYPO3 CMS
- Subcomponent: Indexed Search (ext:indexed_search)
- Release Date: June 9, 2026
- Vulnerability Type: Cross-site Scripting
- Affected Versions: 13.0.0-13.4.30, 14.0.0-14.3.2
- Severity: Medium
- Suggested CVSS: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N
- References: CVE-2026-47348, CWE-79
Problem Description
Editors with access to create or modify page content were able to include HTML markup in page titles that were stored in the search index without sanitization. When displayed in frontend search results via the Indexed Search plugin, these titles were rendered without proper output encoding, resulting in a Cross-Site Scripting vulnerability.
Solution
Update to TYPO3 versions 13.4.31 LTS, 14.3.3 LTS that fix the problem described.
Credits
Thanks to Jan Kahmen and Sanjay Singh Jhala for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it.
General Advice
Follow the recommendations that are given in the TYPO3 Security Guide. Please subscribe to the typo3-announce mailing list.
General Note
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