How to check if you are exposed to CVE-2017-16651
- Find every Roundcube Webmail system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
- Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
- Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2017-16651.
US federal agencies had to fix this by 2022-05-03. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.
Timeline
- · Added to CISA's Known Exploited Vulnerabilities catalog
- · Fix-by date for US federal agencies, passed 1,643 days ago
Weakness type
More exploited Roundcube vulnerabilities
CISA lists 11 exploited Roundcube vulnerabilities. The closest matches:
- CVE-2021-44026Roundcube Webmail SQL Injection VulnerabilityAdded 2023-06-22
- CVE-2020-35730Roundcube Webmail Cross-Site Scripting (XSS) VulnerabilityAdded 2023-06-22
- CVE-2020-12641Roundcube Webmail Remote Code Execution VulnerabilityAdded 2023-06-22
- CVE-2025-68461RoundCube Webmail Cross-site Scripting VulnerabilityAdded 2026-02-20
- CVE-2025-49113RoundCube Webmail Deserialization of Untrusted Data VulnerabilityAdded 2026-02-20
- CVE-2024-42009RoundCube Webmail Cross-Site Scripting VulnerabilityAdded 2025-06-09
- CVE-2024-37383RoundCube Webmail Cross-Site Scripting (XSS) VulnerabilityAdded 2024-10-24
- CVE-2020-13965Roundcube Webmail Cross-Site Scripting (XSS) VulnerabilityAdded 2024-06-26
Keep going
Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.