CVE-2020-13965
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA notes
https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12; https://nvd.nist.gov/vuln/detail/CVE-2020-13965
Description
An issue was discovered in Roundcube Webmail before 1.3.12 and 1.4.x before 1.4.5. There is XSS via a malicious XML attachment because text/xml is among the allowed types for a preview.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:LExploitation Context
as of October 13, 2026- CISA added CVE-2020-13965 to the KEV catalog 1,478 days after its CVE record was published. The median for entries added in 2024 is 21.5 days.
- It is one of 11 Roundcube entries in the CISA KEV catalog, and one of 3 added in 2024.
- Its current EPSS score (76.6%) is higher than that of 61% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| - | - | n/a |
References
9 Links- https://github.com/roundcube/roundcubemail/releases/tag/1.4.5
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.12
- https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3
- https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5
- https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube
Record Details
More from Roundcube
RoundCube Webmail Deserialization of Untrusted Data Vulnerability
RoundCube Webmail Cross-Site Scripting Vulnerability
Stored XSS vulnerability in Roundcube
RoundCube Webmail Cross-Site Scripting (XSS) Vulnerability
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