CVE-2026-46725

Critical

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.

SeverityCritical

CVSS9.2

Exploit probability—

ProductMmc/ceselector

PublishedMay 19, 2026

First seenMay 19, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

mmc/ceselector6.0.1, 5.0.1, 4.0.2, 3.0.3 or later

Vendor advisories

typo3.org/security/advisory/typo3-ext-sa-2026-013

Affected products

Product	Affected versions	Fixed in
mmc/ceselectorPackagist	6.0.0 ≤ v < 6.0.1, 5.0.0 ≤ v < 5.0.1, 4.0.0 ≤ v < 4.0.2, v < 3.0.3	6.0.1, 5.0.1, 4.0.2, 3.0.3

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