June 26, 2024 · Applied Cybernetics Group
CVE-2020-13965 — Roundcube Webmail
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
- Added to KEV
2024-06-26- Federal due date
2024-07-17- Vendor
- Roundcube
- Product
- Webmail
- EPSS
- 99.5th percentile (score 0.766, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2020-13965
CISA short description
Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.