CVE-2020-13965
Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 July 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 76.60% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 26 June 2024 · due 17 July 2024
- Weakness
- CWE-79, CWE-80
- Affected
- roundcube/webmail · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
EPSS 76.6% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. 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
References
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-RoundcubeExploit, Third Party Advisory
- https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3Patch, Third Party Advisory
- https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5Patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.12Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.5Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK/Mailing List
- https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12Vendor Advisory
- https://www.debian.org/security/2020/dsa-4700Third Party Advisory
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-RoundcubeExploit, Third Party Advisory
- https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3Patch, Third Party Advisory
- https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5Patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.3.12Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.4.5Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK/Mailing List
- https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12Vendor Advisory
- https://www.debian.org/security/2020/dsa-4700Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13965US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.