GHSA-2rcw-9hrm-8q7q TYPO3 Cross-Site Scripting in Frontend User Login
Authenticated users can inject scripts into the frontend login status display, potentially stealing session cookies or performing actions on behalf of other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is GHSA-2rcw-9hrm-8q7q?
GHSA-2rcw-9hrm-8q7q is a cross-site scripting vulnerability in typo3/cms, published on 7 Jun 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Failing to properly encode user input, login status display is vulnerable to cross-site scripting in the website frontend. A valid user account is needed in order to exploit this vulnerability - either a backend user or a frontend user having the possibility to modify their user profile.
Template patterns that are affected are
- ###FEUSER_[fieldName]### using system extension felogin
- <!–###USERNAME###–> for regular frontend rendering (pattern can be defined individually using TypoScript setting config.USERNAME_substToken)
Which versions are affected by GHSA-2rcw-9hrm-8q7q?
6 open source packages ship an affected version, including typo3/cms.
| Package | Affected | Fixed in |
|---|---|---|
typo3/cms Packagist | From 7.0.0 | 7.6.32 |
typo3/cms Packagist | From 7.0.0 | 7.6.32 |
typo3/cms Packagist | From 8.0.0 | 8.7.21 |
typo3/cms Packagist | From 8.0.0 | 8.7.21 |
typo3/cms Packagist | From 9.0.0 | 9.5.2 |
typo3/cms Packagist | From 9.0.0 | 9.5.2 |
How do I fix GHSA-2rcw-9hrm-8q7q?
Upgrade typo3/cms to a fixed version for your release line: 7.6.32, 8.7.21 or 9.5.2.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is GHSA-2rcw-9hrm-8q7q being exploited?
There is no known exploitation of GHSA-2rcw-9hrm-8q7q in the wild and no public exploit code.