What’s Vulnerable › Vulnerabilities

CVE-2025-49113: RoundCube Webmail Deserialization of Untrusted Data Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-02-20
• EPSS: 99.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-02 · updated 2026-06-17
• Weakness: CWE-502

Description

Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the _from parameter in a URL is not validated in program/actions/settings/upload.php, leading to PHP Object Deserialization.

Affected products

• Debian Linux: 11.0
• Roundcube Webmail: before 1.5.10; from 1.6.0 before 1.6.11 — fixed in 1.5.10, 1.6.11

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.5.10, 1.6.11. Check the vendor advisory for mitigations.

References

• https://fearsoff.org/research/roundcube
• https://github.com/roundcube/roundcubemail/commit/0376f69e958a8fef7f6f09e352c541b4e7729c4d
• https://github.com/roundcube/roundcubemail/commit/7408f31379666124a39f9cb1018f62bc5e2dc695
• https://github.com/roundcube/roundcubemail/commit/c50a07d88ca38f018a0f4a0b008e9a1deb32637e
• https://github.com/roundcube/roundcubemail/pull/9865
• https://github.com/roundcube/roundcubemail/releases/tag/1.5.10
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.11
• https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10
• https://www.vicarius.io/vsociety/posts/cve-2025-49113-roundcube-mitigation-script
• https://www.vicarius.io/vsociety/posts/cve-2025-49113-roundcube-vulnerability-detection
• http://www.openwall.com/lists/oss-security/2025/06/02/3
• https://lists.debian.org/debian-lts-announce/2025/06/msg00008.html

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