Medium severity5.4NVD Advisory· Published May 25, 2021· Updated Jun 17, 2026
CVE-2021-21660
CVE-2021-21660
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
io.jenkins.plugins:markdown-formatterMaven | < 0.2.0 | 0.2.0 |
Affected products
3- cpe:2.3:a:jenkins:markdown_formatter:*:*:*:*:*:jenkins:*:*Range: <=0.1.0
- Range: unspecified
Patches
Vulnerability mechanics
References
6- www.openwall.com/lists/oss-security/2021/05/25/3nvdMailing ListThird Party AdvisoryWEB
- github.com/advisories/GHSA-xqpp-26pp-2365ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-21660ghsaADVISORY
- www.jenkins.io/security/advisory/2021-05-25/nvdVendor AdvisoryWEB
- www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660nvdThird Party AdvisoryWEB
- github.com/jenkinsci/markdown-formatter-plugin/commit/6b283a5bba3424fd5174b92e7ad8724cdbdf596cghsaWEB
News mentions
1- Jenkins Security Advisory 2021-05-25Jenkins Security Advisories · May 25, 2021