Roundcube · Webmail
CVE-2025-49113
RoundCube Webmail Deserialization of Untrusted Data Vulnerability
What it is
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.
CISA: 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.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: March 13, 2026
- Added to the CISA list
- February 20, 2026
- Published
- June 2, 2025
- Severity
- Critical 9.9 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 99.7% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-502
- More details
- NVD · CVE.org · CISA
All references (10)
- https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10
- https://github.com/roundcube/roundcubemail/pull/9865
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.11
- https://github.com/roundcube/roundcubemail/commit/0376f69e958a8fef7f6f09e352c541b4e7729c4d
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.10
- https://github.com/roundcube/roundcubemail/commit/7408f31379666124a39f9cb1018f62bc5e2dc695
- https://github.com/roundcube/roundcubemail/commit/c50a07d88ca38f018a0f4a0b008e9a1deb32637e
- https://fearsoff.org/research/roundcube
- https://www.vicarius.io/vsociety/posts/cve-2025-49113-roundcube-vulnerability-detection
- https://www.vicarius.io/vsociety/posts/cve-2025-49113-roundcube-mitigation-script
More exploited flaws from Roundcube
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Feb 20, 2026 | Cross-site Scripting | Webmail | High 7.2 | 27% |
| Jun 9, 2025 | Cross-Site Scripting | Webmail | Critical 9.3 | 83% |
| Oct 24, 2024 | Cross-Site Scripting (XSS) | Webmail | Medium 6.1 | 74% |
| Jun 26, 2024 | Cross-Site Scripting (XSS) | Webmail | Medium 6.3 | 77% |
| Feb 12, 2024 | Persistent Cross-Site Scripting (XSS) | Webmail | Medium 6.1 | 64% |
| Oct 26, 2023 | Persistent Cross-Site Scripting (XSS) | Webmail | Medium 6.1 | 76% |
| Jun 22, 2023 | Webmail Remote Code Execution | Roundcube Webmail | Critical 9.8 | 84% |
| Jun 22, 2023 | Webmail Cross-Site Scripting (XSS) | Roundcube Webmail | Medium 6.1 | 33% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.