CVE-2026-46725 Remote Code Execution in extension "Content Element Selector" (ceselector)
Remote unauthenticated attackers can achieve code execution via PHP object injection in the Content Element Selector extension when persistent mode is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46725?
CVE-2026-46725 is a critical unsafe deserialization vulnerability in TYPO3 Extension "Content Element Selector", published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2026-46725?
8 open source packages ship an affected version, including mmc/ceselector.
| Package | Affected | Fixed in |
|---|---|---|
mmc/ceselector Packagist | All versions | 3.0.3 |
mmc/ceselector Packagist | All versions | 3.0.3 |
mmc/ceselector Packagist | From 4.0.0 | 4.0.2 |
mmc/ceselector Packagist | From 4.0.0 | 4.0.2 |
mmc/ceselector Packagist | From 5.0.0 | 5.0.1 |
mmc/ceselector Packagist | From 5.0.0 | 5.0.1 |
2 more packages
mmc/ceselector Packagist | From 6.0.0 | 6.0.1 |
mmc/ceselector Packagist | From 6.0.0 | 6.0.1 |
How do I fix CVE-2026-46725?
Upgrade mmc/ceselector to a fixed version for your release line: 3.0.3, 4.0.2, 5.0.1 or 6.0.1.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-46725 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46725 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-8x3j-439w-537c.