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CVE-2020-13965

MediumPublished

Roundcube Webmail Cross-Site Scripting (XSS) Vulnerability

Published: Jun 9, 2020
Updated: Oct 21, 2025
Assigning CNA: mitre
Evidence observed: Jun 26, 2024

Primary CVSS

6.3/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

EPSS probability estimate

76.6%

High · next 30 days

Percentile: 99.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

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.

Sources

CVE-2020-13965PoC
CVE-2020-13965: Cross-Site Scripting via Malicious XML Attachment in Roundcube Webmail

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