CVE-2026-46725

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

State: Published
Severity: 9.2 Critical
Published: May 19, 2026
Updated: May 19, 2026
Reserved: May 16, 2026

Description

The 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.

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	TYPO3

Weaknesses

CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
Extension "Content Element Selector"TYPO3	6.0.0 to before 6.0.1Affected 5.0.0 to before 5.0.1Affected 4.0.0 to before 4.0.2Affected before 3.0.3Affected

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-013vendor-advisory

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