CVE-2020-13965
KEVRoundcube Webmail Cross-Site Scripting (XSS) Vulnerability
Description
Roundcube Webmail contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to manipulate data via a malicious XML attachment.
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.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NPublishedJun 9, 2020
Last modifiedJun 17, 2026
Added to KEVJun 26, 2024
Remediation dueJul 17, 2024
References
- github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-RoundcubeExploitThird Party Advisory
- github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3PatchThird Party Advisory
- github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5Patch
- github.com/roundcube/roundcubemail/releases/tag/1.3.12Release Notes
- github.com/roundcube/roundcubemail/releases/tag/1.4.5Release Notes
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW/Mailing List
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK/Mailing List
- roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12Vendor Advisory
- debian.org/security/2020/dsa-4700Third Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13965US Government Resource
0 recent articles mention this CVE
68
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 832 days
- CVSS
- 6.1 MEDIUM
- EPSS (30-day exploit probability)
- 76.6% · top 1% of all CVEs
- Weakness
- CWE-79
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.