---
title: "TYPO3-CORE-SA-2017-004: Cross-Site Scripting in TYPO3 CMS Backend"
url: "https://news.typo3.com/security/advisory/typo3-core-sa-2017-004"
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-2017-004: Cross-Site Scripting in TYPO3 CMS Backend

- [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-2017-004: Cross-Site Scripting in TYPO3 CMS Backend
=================================================================

05 September 2017

![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/b8266fdc667b773926c59081862ab148.jpeg)[Oliver Hader](https://news.typo3.com/article/author/oliver-hader)

**Component Type:** TYPO3 CMS

**Release Date:** September 5, 2017

**Vulnerability Type:** Cross-Site Scripting

**Affected Versions:** 8.0.0 to 8.7.4

**Severity:** Low

**Suggested CVSS v2.0:** [AV:N/AC:L/Au:S/C:P/I:P/A:N/E:F/RL:OF/RC:C](https://nvd.nist.gov/vuln-metrics/cvss/v2-calculator?vector=(AV:N/AC:L/Au:S/C:P/I:P/A:N/E:F/RL:OF/RC:C))

**CVE:** not assigned yet

**Problem Description:** Failing to properly encode user input, backend forms are vulnerable to Cross-Site Scripting. A valid backend user account is needed to exploit this vulnerability.

**Solution:** Update to TYPO3 version 8.7.5 that fixes the problem described.

**Credits:** Thanks to TYPO3 core and security team member Georg Ringer who reported and fixed the issue.

**General Advice:** Follow the recommendations that are given in the [TYPO3 Security Guide](http://docs.typo3.org/typo3cms/SecurityGuide/ "Opens external link in new window"). 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 on 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/cc7cba9757f98fbe05023a139119df74.jpeg)

About the Author

[Oliver Hader](https://news.typo3.com/article/author/oliver-hader)

Core Developer at TYPO3 GmbH,Hof, Germany

[Website](https://typo3.com)[Twitter](https://twitter.com/ohader)[LinkedIn](https://www.linkedin.com/in/oliverhader/)[Xing](https://www.xing.com/profile/Oliver_Hader)

Oliver started to work with TYPO3 in 2005 and was fascinated by the product and its universe. Since 2007 he is member of the TYPO3 Core Team. After going back to university in 2014 for achieving a postgraduate master degree in internet web science, he is now researching on advanced web technology topics in general and for TYPO3 in particular.

In his spare time, Oliver loves to go cycling cross-country in the uplands around Hof (Germany) in northern Bavaria - at the region where he's living as well.

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