--- title: "TYPO3-CORE-SA-2019-023: Cross-Site Scripting in Filelist Module" url: "https://news.typo3.com/security/advisory/typo3-core-sa-2019-023" description: It has been discovered that TYPO3 CMS is vulnerable to cross-site scripting. image: "https://news.typo3.com/_assets/d1e01514e4c4a5b3147940fa2ec50682/Images/og-image-news.jpg" date: 2026-06-11 modified: 2026-06-11 categories: - "Developer & Technology" - TYPO3 CMS --- # TYPO3-CORE-SA-2019-023: Cross-Site Scripting in Filelist Module - [Developer & Technology](https://news.typo3.com/article/category/developer-technology) - Security / [TYPO3 CMS](https://news.typo3.com/article/category/security/typo3-cms) TYPO3-CORE-SA-2019-023: Cross-Site Scripting in Filelist Module =============================================================== 17 December 2019 ![A laptop screen displaying a list of security advisories](https://news.typo3.com/typo3temp/assets/_processed_/d/c/csm_security_blog_default_77f8e86036.webp) It has been discovered that TYPO3 CMS is vulnerable to cross-site scripting. - ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/f2fb4b0dfde60af4f05c0b05d7e1a24f.jpeg)[Andreas Fernandez](https://news.typo3.com/article/author/andreas-fernandez) - **Component Type:** TYPO3 CMS - **Subcomponent:** Filelist Module (ext:filelist) - **Release Date:** December 17, 2019 - **Vulnerability Type:** Cross-Site Scripting - **Affected Versions:** 8.0.0-8.7.29, 9.0.0-9.5.11 and 10.0.0-10.2.0 - **Severity:** Medium - **Suggested CVSS v3.1:** [AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C](https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C&version=3.1) - **CVE:** not assigned yet ### Problem Description It has been discovered that the output table listing in the “Files” backend module is vulnerable to cross-site scripting when a file extension contains malicious sequences. Access to the file system of the server - either directly or through synchronization - is required to exploit the vulnerability. ### Solution Update to TYPO3 versions 8.7.30 or 9.5.12 or 10.2.2 that fix the problem described. ### Credits Thanks to [zimmer7 GmbH](https://zimmer7.com/) who reported this issue and to TYPO3 framework merger Andreas Fernandez who fixed the issue. ### General Advice Follow the recommendations that are given in the [TYPO3 Security Guide](https://docs.typo3.org/typo3cms/CoreApiReference/Security/Index.html#security). Please subscribe to the [typo3-announce](http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce) mailing list. ### General Note All security related code changes are tagged so that you can easily look them up in our [review system](https://review.typo3.org/#/q/status:merged+project:Packages/TYPO3.CMS+topic:security,n,z). ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/3f2717cf0a25e45a9dbd872783ab903a.jpeg) About the Author [Andreas Fernandez](https://news.typo3.com/article/author/andreas-fernandez) [More posts by this author](https://news.typo3.com/article/author/andreas-fernandez)