GHSA-g4c9-qfvw-fmr4 TYPO3 Cross-Site Scripting in Backend Modal Component
Authenticated backend users can execute arbitrary scripts via unencoded input in TYPO3 modal notifications, potentially leading to session hijacking or privilege escalation.
- 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-g4c9-qfvw-fmr4?
GHSA-g4c9-qfvw-fmr4 is a cross-site scripting vulnerability in typo3/cms-core, published on 30 May 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
Which versions are affected by GHSA-g4c9-qfvw-fmr4?
6 open source packages ship an affected version, including typo3/cms-core.
| Package | Affected | Fixed in |
|---|---|---|
typo3/cms-core Packagist | From 7.1.0 | 7.6.32 |
typo3/cms-core Packagist | From 7.1.0 | 7.6.32 |
typo3/cms-core Packagist | From 8.0.0 | 8.7.21 |
typo3/cms-core Packagist | From 8.0.0 | 8.7.21 |
typo3/cms-core Packagist | From 9.0.0 | 9.5.2 |
typo3/cms-core Packagist | From 9.0.0 | 9.5.2 |
How do I fix GHSA-g4c9-qfvw-fmr4?
Upgrade typo3/cms-core 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-g4c9-qfvw-fmr4 being exploited?
There is no known exploitation of GHSA-g4c9-qfvw-fmr4 in the wild and no public exploit code.