TYPO3 Cross-Site Scripting in Backend Modal Component
Priority LOW 38CWE-79Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-79.
Summary
Failing to properly encode user input, notifications shown in modal windows in the TYPO3 backend are vulnerable to cross-site scripting. A valid backend user account is needed in order to exploit this vulnerability.
Why it matters now
Fix Fixed typo3/cms-core (Packagist): 8.7.21, 9.5.2, 7.6.32
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | typo3/cms-core (Packagist) | 8.0.0 to before 8.7.21 | 8.7.21 | Patch available | GHSA-g4c9-qfvw-fmr4 |
| — | typo3/cms-core (Packagist) | 9.0.0 to before 9.5.2 | 9.5.2 | Patch available | GHSA-g4c9-qfvw-fmr4 |
| — | typo3/cms-core (Packagist) | 7.1.0 to before 7.6.32 | 7.6.32 | Patch available | GHSA-g4c9-qfvw-fmr4 |
- typo3/cms-core (Packagist) Vendor— Affected 8.0.0 to before 8.7.21 Fixed in 8.7.21 Patch available GHSA-g4c9-qfvw-fmr4
- typo3/cms-core (Packagist) Vendor— Affected 9.0.0 to before 9.5.2 Fixed in 9.5.2 Patch available GHSA-g4c9-qfvw-fmr4
- typo3/cms-core (Packagist) Vendor— Affected 7.1.0 to before 7.6.32 Fixed in 7.6.32 Patch available GHSA-g4c9-qfvw-fmr4
Remediation
- Fix · GHSA-g4c9-qfvw-fmr4 typo3/cms-core (Packagist) Fixed in 8.7.21 Advisory →
- Fix · GHSA-g4c9-qfvw-fmr4 typo3/cms-core (Packagist) Fixed in 9.5.2 Advisory →
- Fix · GHSA-g4c9-qfvw-fmr4 typo3/cms-core (Packagist) Fixed in 7.6.32 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-g4c9-qfvw-fmr4
References
Other 5
- https://github.com/TYPO3-CMS/core/commit/3c1deac4db61ac1ac4231799beb1f49c28eb2b4d
- https://github.com/TYPO3-CMS/core/commit/983ecc4ea3a841aca7ff2bb1d2f0e0318c3646b3
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2018-12-11-2.yaml
- https://github.com/TYPO3-CMS/core
- https://typo3.org/security/advisory/typo3-core-sa-2018-007
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences