XSS in Jenkins Markdown Formatter
CVE-2021-21660
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.011 (62.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Jenkins Markdown_formatter
- Jenkins Project Markdown Formatter Plugin — versions unspecified
Weakness classification (CWE)
References
- jenkinsci-cert@googlegroups.com (x_refsource_CONFIRM, Vendor Advisory)
- jenkinsci-cert@googlegroups.com (Third Party Advisory, x_refsource_MISC)
- jenkinsci-cert@googlegroups.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21660?
- CVE-2021-21660 is a medium-severity vulnerability in Jenkins Markdown Formatter, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-05-25.
- How severe is CVE-2021-21660?
- Medium severity. CVSS v3 base score is 5.4 out of 10.