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GHSA-8x3j-439w-537c

TYPO3 Remote Code Execution in extension "Content Element Selector" (ceselector)

Source: GitHub Advisory Database (reviewed) Critical CVE-2026-46725

Packages

EcosystemPackageAffectedFixed in
Packagist mmc/ceselector >= 6.0.0, < 6.0.1 6.0.1
Packagist mmc/ceselector >= 5.0.0, < 5.0.1 5.0.1
Packagist mmc/ceselector >= 4.0.0, < 4.0.2 4.0.2
Packagist mmc/ceselector < 3.0.3 3.0.3

Details

As written in the advisory (Markdown source, shown as plain text).

The TYPO3 "Content Element Selector" (ceselector) extension passes an attacker-controlled cookie directly to PHP's `unserialize()` without safely processing the input. A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server. Exploitation requires the content element to be configured with `Persistent Mode: Static` in the plugin settings. This has been patched in version 3.0.3, 4.0.2, 5.0.1, and 6.0.1.

References

External links from the advisory. They lead to third-party sites.