Typo3 Arbitrary Code Execution and Cross-Site Scripting in Backend API
Priority LOW 38Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub.
Summary
Backend API configuration using Page TSconfig is vulnerable to arbitrary code execution and cross-site scripting. TSconfig fields of page properties in backend forms can be used to inject malicious sequences. Field tsconfig_includes is vulnerable to directory traversal leading to same scenarios as having direct access to TSconfig settings. A valid backend user account having access to modify values for fields pages.TSconfig and pages.tsconfig_includes is needed in order to exploit this vulnerability.
Why it matters now
Fix Fixed typo3/cms (Packagist): 8.7.27, 9.5.8
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 (Packagist) | 8.0.0 to before 8.7.27 | 8.7.27 | Patch available | GHSA-hww5-6x85-mc24 |
| — | typo3/cms (Packagist) | 9.0.0 to before 9.5.8 | 9.5.8 | Patch available | GHSA-hww5-6x85-mc24 |
- typo3/cms (Packagist) Vendor— Affected 8.0.0 to before 8.7.27 Fixed in 8.7.27 Patch available GHSA-hww5-6x85-mc24
- typo3/cms (Packagist) Vendor— Affected 9.0.0 to before 9.5.8 Fixed in 9.5.8 Patch available GHSA-hww5-6x85-mc24
Remediation
- Fix · GHSA-hww5-6x85-mc24 typo3/cms (Packagist) Fixed in 8.7.27 Advisory →
- Fix · GHSA-hww5-6x85-mc24 typo3/cms (Packagist) Fixed in 9.5.8 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-hww5-6x85-mc24
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences