---
title: "TYPO3-EXT-SA-2011-003: Several Vulnerabilities in extension Formhandler (formhandler)"
url: "https://news.typo3.com/security/advisory/typo3-ext-sa-2011-003"
description: It has been discovered that the extension Formhandler (formhandler) is vulnerable to SQL-Injection and Cross-Site Scripting.
image: "https://news.typo3.com/_assets/d1e01514e4c4a5b3147940fa2ec50682/Images/og-image-news.jpg"
date: 2026-06-11
modified: 2026-06-11
categories:
  - TYPO3 Extensions
---

# TYPO3-EXT-SA-2011-003: Several Vulnerabilities in extension Formhandler (formhandler)

- Security / [TYPO3 Extensions](https://news.typo3.com/article/category/security/typo3-extensions)

TYPO3-EXT-SA-2011-003: Several Vulnerabilities in extension Formhandler (formhandler)
=====================================================================================

25 August 2011

![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 Formhandler (formhandler) is vulnerable to SQL-Injection and Cross-Site Scripting.

- ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/7569d41262328e5ed8d27b53e03970ec.png)[Helmut Hummel](https://news.typo3.com/article/author/helmut-hummel)

**Component Type:** Third party extension. This extension is not a part of the TYPO3 default installation.

**Affected Versions:** Version 0.9.14 and below

**Vulnerability Types:** SQL Injection, Cross-Site Scripting

**Severity:** Medium

**Suggested CVSS v2.0:** [AV:N/AC:L/Au:S/C:P/I:C/A:P/E:U/RL:OF/RC:C](http://jvnrss.ise.chuo-u.ac.jp/jtg/cvss/cvss2.cgi?vector=%28AV:N/AC:L/Au:S/C:P/I:C/A:P/E:U/RL:OF/RC:C%29&g=2&lang=en "CVSS calculator") ([What's that?](http://buzz.typo3.org/teams/security/article/use-of-common-vulnerability-scoring-system-in-typo3-security-advisories/ "Blog post on CVSS usage"))

**Release Date:** 25.08.2011

**Problem Description:** Failing to properly sanitize user input, formhandler is susceptible to SQL Injection. An attacker could delete arbitrary database tables. Editors rights with permission to use the formhandler backend module are required for this to work.

Failing to encode user data for the HTML output, formhandler is susceptible to Cross Site Scripting. Exploiting this issue is not possible in the default configuration since formhandler performs several filters on the entered data. But it is possible to turn this filter off in the TypoScript configuration.

**Solution:** An updated version 0.9.15 is available from the TYPO3 extension manager and at[typo3.org/extensions/repository/view/formhandler/0.9.15/](http://typo3.org/extensions/repository/view/formhandler/0.9.15/).

Credits: Thanks to Jens Hoffrichter who discovered and reported this issue.

**General advice:** Follow the recommendations that are given in the [TYPO3 Security Cookbook](http://typo3.org/teams/security/security-bulletins/typo3-extensions/fileadmin/security-team/typo3_security_cookbook_v-0.5.pdf "Initiates file download"). Please subscribe to the[typo3-announce mailing list](http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce "Opens external link in new window") to receive future Security Bulletins via E-mail.

![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/bb9efc51bced8582e7b8c235f4b5f2b5.png)

About the Author

[Helmut Hummel](https://news.typo3.com/article/author/helmut-hummel)

[More posts by this author](https://news.typo3.com/article/author/helmut-hummel)