TYPO3 CMS Insecure Deserialization
Priority LOW 38CWE-502Published · Updated
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- Code execution
- Confidentiality · integrity · availability
- —
- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-502.
Summary
It has been discovered that the Form Framework (system extension `form`) is vulnerable to Insecure Deserialization when being used with the additional PHP PECL package `yaml`, which is capable of unserializing YAML contents to PHP objects. A valid backend user account as well as having PHP setting `yaml.decode_php` enabled is needed to exploit this vulnerability (which is the default value according to PHP documentation).
Why it matters now
Fix Fixed typo3/cms-core (Packagist): 8.7.17, 9.3.1
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) | 8.5.0 to before 8.7.17 | 8.7.17 | Patch available | GHSA-96jg-pmc4-cx39 |
| — | typo3/cms-core (Packagist) | 9.0.0 to before 9.3.1 | 9.3.1 | Patch available | GHSA-96jg-pmc4-cx39 |
- typo3/cms-core (Packagist) Vendor— Affected 8.5.0 to before 8.7.17 Fixed in 8.7.17 Patch available GHSA-96jg-pmc4-cx39
- typo3/cms-core (Packagist) Vendor— Affected 9.0.0 to before 9.3.1 Fixed in 9.3.1 Patch available GHSA-96jg-pmc4-cx39
Remediation
- Fix · GHSA-96jg-pmc4-cx39 typo3/cms-core (Packagist) Fixed in 8.7.17 Advisory →
- Fix · GHSA-96jg-pmc4-cx39 typo3/cms-core (Packagist) Fixed in 9.3.1 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-96jg-pmc4-cx39
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences