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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.011 (64.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Jenkins Markdown Formatter
- Jenkins Project Markdown Formatter Plugin — versions unspecified
Weakness classification (CWE)
References
- www.jenkins.io/security/advisory/2021-05-25/ (Vendor Advisory)
- www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660 (Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/05/25/3 (mailing-list, 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.