Deserialization in Bewelcome Rox
CVE-2025-34292
Rox, the software running BeWelcome, contains a PHP object injection vulnerability resulting from deserialization of untrusted data. User-controlled input is passed to PHP's unserialize(): the POST parameter `formkit_memory_recovery` in \\RoxPostHandler::getCallbackAction and the 'memory cookie' read by \\RoxModelBase::getMemoryCookie (bwRemember). (1) If present, `formkit_memory_recovery` is processed and passed to unserialize(), and (2) restore-from-memory functionality calls unserialize() on the bwRemember cookie value. Gadget chains present in Rox and bundled libraries enable exploitation of object injection to write arbitrary files or achieve remote code execution. Successful exploitation can lead to full site compromise. This vulnerability was remediated with commit c60bf04 (2025-06-16).
Vulnerability class: Insecure Deserialization
Published · last modified .
EPSS exploit prediction
EPSS: 0.006 (46.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Bewelcome Rox — versions 0
Weakness classification (CWE)
References
- github.com/BeWelcome/rox (product)
- gist.github.com/mcdruid/c0f7c42b28949c7d86cf77d0c674f398 (technical-description, exploit)
- github.com/BeWelcome/rox/commit/c60bf04 (patch)
- www.vulncheck.com/advisories/rox-php-object-injection-rce (third-party-advisory)