CVE-2021-21660

medium

Description

Jenkins Markdown Formatter Plugin 0.1.0 and earlier does not sanitize crafted link target URLs, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with the ability to edit any description rendered using the configured markup formatter.

References

Advisories
More

https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660

http://www.openwall.com/lists/oss-security/2021/05/25/3

https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2198

Details

Source: Mitre, NVD

Published: 2021-05-25

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 5.4

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

Severity: Medium

EPSS

EPSS: 0.03267