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.
Roundcube ยท Webmail
Known ransomware use: Unknown
Follow the source advisory and validate exposure in your environment.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Recent reporting that mentions CVE-2025-49113.
Over 84,000 instances of the Roundcube webmail software are vulnerable to CVE-2025-49113, a critical remote code execution (RCE) vulnerability with a publicly available exploit. [...]
Hackers are actively exploiting CVE-2025-49113, a critical vulnerability in the widely used Roundcube open-source webmail application that allows remote execution. [...]