Description
view_help.php in the backend help system in TYPO3 4.5.x before 4.5.19, 4.6.x before 4.6.12 and 4.7.x before 4.7.4 allows remote authenticated backend users to unserialize arbitrary objects and possibly execute arbitrary PHP code via an unspecified parameter, related to a "missing signature (HMAC)."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | typo3-src | 4.3.9+dfsg1-1+squeeze5 | DSA-2537-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | typo3/cms | >= 4.5.0, < 4.5.19 | 4.5.19 | GHSA-m4hw-r893-xh4g |
| Packagist | typo3/cms | >= 4.6.0, < 4.6.12 | 4.6.12 | GHSA-m4hw-r893-xh4g |
| Packagist | typo3/cms | >= 4.7.0, < 4.7.4 | 4.7.4 | GHSA-m4hw-r893-xh4g |
Advisories 1
- DSA-2537-1 typo3-src - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2012-004/
- DSA-2537 vendor-advisory
- [oss-security] 20120822 Re: CVE request: Typo3 mailing-list
- typo3-viewhelp-code-exec(77791) vdb-entry
- 84773 vdb-entry
- 50287 third-party-advisory