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CVE-2020-13965

90
FAUCET Score

CVE-2020-13965 is a Cross-Site Scripting (XSS) vulnerability in Roundcube Webmail versions prior to 1.3.12 and 1.4.5, allowing attackers to execute malicious scripts via specially crafted XML attachments due to improper handling of text/xml previews. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. Notably, this flaw is actively exploited in the wild, as confirmed by its presence in CISA's KEV catalog, and has garnered significant community discussion and media coverage, despite no public exploit code being readily available.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.3.12CPE matchmatch criteria
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
>= 1.4.0, < 1.4.5CPE matchmatch criteria
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
31CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
76.60%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Jun 26, 2024
This CVE's current EPSS score of 0.7660 is in the 100th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-13965Moderate

roundcubemail: XSS via a malicious XML attachment

Jun 9, 2020

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
github.com / DrunkenShells/Disclosures/tree/master/CVE-2020-13965-Cross%20Site-Scripting%20via%20Malicious%20XML%20Attachment-Roundcube
ExploitThird Party Advisory
github.com / roundcube/roundcubemail/commit/884eb611627ef2bd5a2e20e02009ebb1eceecdc3
PatchThird Party Advisory
github.com / roundcube/roundcubemail/compare/1.4.4...1.4.5
Patch
github.com / roundcube/roundcubemail/releases/tag/1.3.12
Release Notes
github.com / roundcube/roundcubemail/releases/tag/1.4.5
Release 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-1.3.12
Vendor Advisory
debian.org / security/2020/dsa-4700
Third Party Advisory