--- title: "TYPO3-EXT-SA-2021-001: SQL Injection in extension \"VHS: Fluid ViewHelpers\" (vhs)" url: "https://news.typo3.com/security/advisory/typo3-ext-sa-2021-001" description: "It has been discovered that the extension \"VHS: Fluid ViewHelpers\" (vhs) is susceptible to SQL Injection." 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-2021-001: SQL Injection in extension "VHS: Fluid ViewHelpers" (vhs) - [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-2021-001: SQL Injection in extension "VHS: Fluid ViewHelpers" (vhs) ================================================================================ 16 March 2021 ![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 "VHS: Fluid ViewHelpers" (vhs) is susceptible to SQL Injection. - ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/e4eaa13e33dd086a9c06f2570cb34609.jpeg)[Torben Hansen](https://news.typo3.com/article/author/torben-hansen) - Release Date: March 16, 2021 - Component Type: Third party extension. This extension is not a part of the TYPO3 default installation. - Component: "VHS: Fluid ViewHelpers" (vhs) - Vulnerability Type: SQL Injection - Affected Versions: 5.1.0 and below - Severity: Medium - Suggested CVSS: [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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:H/PR:N/UI:N/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C&version=3.1) - References: [CVE-2021-28381](https://nvd.nist.gov/vuln/detail/CVE-2021-28381) ### Problem Description It has been discovered that the extension is susceptible to blind SQL Injection when user input is passed to the isLanguageViewHelper. ### Solution An updated version 5.1.1  is available from the TYPO3 extension manager, Packagist and at . Users of the extension are advised to update the extension as soon as possible. Please note, that version 5.x is no longer maintained by the extension author. If possible, please update to at least version 6.x. ### Credits Thanks to TYPO3 Security Team Member Oliver Hader for reporting 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-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)