# CVE-2020-13965: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

> CVE-2020-13965: Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability. CVSS 6.3 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-13965
Last updated: 2025-10-21T23:35:42Z

- Published: 2020-06-09 02:45 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: mitre
- CVSS: 6.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- EPSS: 76.6%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2024-06-26, federal due date 2024-07-17, ransomware use: Unknown

## 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.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- roundcube: webmail

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-13965)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-13965)
- [https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube](https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube)
- [https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3](https://github.com/roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3)
- [https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5](https://github.com/roundcube/roundcubemail/compare/1.4.4...1.4.5)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.3.12](https://github.com/roundcube/roundcubemail/releases/tag/1.3.12)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.4.5](https://github.com/roundcube/roundcubemail/releases/tag/1.4.5)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/DLESQ4LPJGMSWHQ4TBRTVQRDG7IXAZCW/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/ODPJXBHZ32QSP4MYT2OBCALYXSUJ47SK/)
- [https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12](https://roundcube.net/news/2020/06/02/security-updates-1.4.5-and-1.3.12)
- [https://www.debian.org/security/2020/dsa-4700](https://www.debian.org/security/2020/dsa-4700)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-13965 · Markdown: https://rewindex.com/cve/CVE-2020-13965.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-13965 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:48.626Z