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Vulnerability record · CVE-2025-34292 · published 27 October 2025

CVE-2025-34292: Deserialization of untrusted data vulnerability

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).

9.4 CVSS 4.0 Critical EPSS 0.55% · top 56.4% CWE-502 · Deserialization of untrusted data Deferred
9.4CVSS 4.0 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
14 Jul 2026Last modified by NVD

Description

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).

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://gist.github.com/mcdruid/c0f7c42b28949c7d86cf77d0c674f398
https://github.com/BeWelcome/rox
https://github.com/BeWelcome/rox/commit/c60bf04
https://www.vulncheck.com/advisories/rox-php-object-injection-rce
https://gist.github.com/mcdruid/c0f7c42b28949c7d86cf77d0c674f398

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Source: NIST National Vulnerability Database (record CVE-2025-34292), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.