Critical severity · published May 19, 2026
CVE-2026-46725
Remote Code Execution in extension "Content Element Selector" (ceselector)
9.2
CVSS
2.6%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)2.6% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EC
Extension "Content Element Selector" · TYPO3
6.0.0 before 6.0.1; 5.0.0 before 5.0.1; 4.0.0 before 4.0.2; before 3.0.3 · source: vendor
Affected product
EC
Extension "Content Element Selector"
TYPO3