CVE entry · CVE-2025-49113
CVE-2025-49113: RoundCube Webmail Deserialization of Untrusted Data Vulnerability
RoundCube Webmail contains a deserialization of untrusted data vulnerability that allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php.
- Actively exploited: added to CISA’s KEV catalog on February 20, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: March 13, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Roundcube Webmail, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (roundcube.net)
- Vendor advisory or reference cited by CISA (github.com)
- Vendor advisory or reference cited by CISA (github.com)
- NVD entry (NIST)
- CISA KEV catalog