Deserialization RCE in Roundcube Webmail (CVE‑2025‑49113) Enables Authenticated Remote Code Execution
What It Is — Roundcube Webmail contains a deserialization of untrusted data flaw in actions/settings/upload.php that allows an authenticated attacker to execute arbitrary code via the _from URL parameter.
Exploitability — Requires a valid Roundcube session; proof‑of‑concept code is publicly available and the CVSS base score is 8.8 (High).
Affected Products — Roundcube Webmail (all supported versions prior to the vendor’s March 2025 patch).
Why It Matters for Trust & Control Assurance —
- Demonstrates the necessity of continuous vulnerability monitoring to satisfy control objectives around secure configuration and input validation.
- Shows that timely patching and documented remediation provide defensible audit evidence across frameworks.
- Reinforces the importance of logging and monitoring for anomalous activity after a code‑execution vector is discovered.
Recommended Actions —
- Apply the Roundcube security update that addresses CVE‑2025‑49113 immediately.
- Verify the deployed version via inventory tooling and record the remediation in your change‑management system.
- Strengthen input‑validation controls and enable detailed request logging for the affected endpoint.
- Incorporate this CVE into your continuous control‑mapping process to maintain defensible evidence for audits.
Source: CISA KEV – CVE‑2025‑49113