--- title: "TYPO3-EXT-SA-2019-002: Multiple vulnerabilities in extension \"typo3_forum\" (typo3_forum)" url: "https://news.typo3.com/security/advisory/typo3-ext-sa-2019-002" description: "It has been discovered that the extension \"typo3_forum\" (typo3_forum) is susceptible to Broken Access Control and Improper Filesystem Permissions." image: "https://news.typo3.com/_assets/d1e01514e4c4a5b3147940fa2ec50682/Images/og-image-news.jpg" date: 2026-06-11 modified: 2026-06-11 categories: - "Developer & Technology" - TYPO3 Extensions --- # TYPO3-EXT-SA-2019-002: Multiple vulnerabilities in extension "typo3_forum" (typo3_forum) - [Developer & Technology](https://news.typo3.com/article/category/developer-technology) - Security / [TYPO3 Extensions](https://news.typo3.com/article/category/security/typo3-extensions) TYPO3-EXT-SA-2019-002: Multiple vulnerabilities in extension "typo3\_forum" (typo3\_forum) ========================================================================================== 22 January 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 the extension "typo3\_forum" (typo3\_forum) is susceptible to Broken Access Control and Improper Filesystem Permissions. - ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/e4eaa13e33dd086a9c06f2570cb34609.jpeg)[Torben Hansen](https://news.typo3.com/article/author/torben-hansen) - Release Date: January 22, 2019 - Component Type: Third party extension. This extension is not a part of the TYPO3 default installation. - Vulnerability Type: Multiple vulnerabilities - Affected Versions: 1.1.0 and below - Severity: Medium - Suggested CVSS v3.0: [AV:N/AC:L/PR:L/UI:N/S:U/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:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C) - CVE: not assigned yet ### Problem Description The extension fails to property check User Access Rights to posts which makes it possible for registered forum users to modify and take over posts of foreign users. The extension also creates an upload directory with 777 permissions. ### Solution An updated version 1.1.1  is available from the TYPO3 extension manager and at . Users of the extension are advised to update the extension as soon as possible. Users are advised to manually check and correct  the permissions of the directory “uploads/tx\_typo3forum/attachments/” to the value configured in \[SYS\]\[folderCreateMask\] ### Credits Thanks to Sebastian Muszynski who discovered and reported the vulnerability. ### General Advice Follow the recommendations that are given in the [TYPO3 Security Guide](https://docs.typo3.org/typo3cms/CoreApiReference/Security/Index.html#security-guidelines). Please subscribe to the [typo3-announce](http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce) mailing list. ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/7cf52722a5b7183b29d378a2284bd103.jpeg) About the Author [Torben Hansen](https://news.typo3.com/article/author/torben-hansen) Open Source Enthusiast & TYPO3 Expert I’m a passionate open-source advocate and dedicated TYPO3 expert. As a freelancer, I offer professional TYPO3 services to clients while actively contributing to the TYPO3 ecosystem. I have developed several public TYPO3 extensions and serve as the Co-Lead of the TYPO3 Security Team, helping to enhance the platform’s security and functionality. For many years, I have been blogging about TYPO3, sharing insights and expertise with the community. [More posts by this author](https://news.typo3.com/article/author/torben-hansen)