CVE-2025-66571 UNA CMS 9.0.0-RC1 - 14.0.0-RC4 PHP Object Injection
Remote unauthenticated attackers can achieve arbitrary code execution via PHP object injection in UNA CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66571?
CVE-2025-66571 is a critical unsafe deserialization vulnerability in Unknown UNA CMS, published on 4 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
UNA CMS versions 9.0.0-RC1 - 14.0.0-RC4 contain a PHP object injection vulnerability in BxBaseMenuSetAclLevel.php where the profile_id POST parameter is passed to PHP unserialize() without proper handling, allowing remote, unauthenticated attackers to inject arbitrary PHP objects and potentially write and execute arbitrary PHP code.
Weakness: CWE-502
Which versions are affected by CVE-2025-66571?
How do I fix CVE-2025-66571?
No fix has been published for CVE-2025-66571 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-66571 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66571 exists.
Sources
Also known as GHSA-fc26-hj5x-86vx.