Cross-site scripting in Jenkins Markdown Formatter Plugin
Priority LOW 27CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
EPSS 0.01087 65th percentileScored 2026-11-07
Fix Fixed io.jenkins.plugins:markdown-formatter (Maven): 0.2.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Jenkins | Jenkins Markdown Formatter Plugin | up to 0.1.0 | — | No fix listed | CNA |
| — | io.jenkins.plugins:markdown-formatter (Maven) | before 0.2.0 | 0.2.0 | Patch available | GHSA-xqpp-26pp-2365 |
- Jenkins Markdown Formatter Plugin VendorJenkins Affected up to 0.1.0 Fixed in — No fix listed CNA
- io.jenkins.plugins:markdown-formatter (Maven) Vendor— Affected before 0.2.0 Fixed in 0.2.0 Patch available GHSA-xqpp-26pp-2365
Remediation
- Fix · GHSA-xqpp-26pp-2365 io.jenkins.plugins:markdown-formatter (Maven) Fixed in 0.2.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-21660
- 2026-10-03 Alias added: GHSA-xqpp-26pp-2365
References
Advisory 4
Sources
- CVE-2021-21660 · CVE Program
- CVE-2021-21660 · NVD
- FIRST EPSS
- GHSA-xqpp-26pp-2365 · GitHub Advisory Database · CC BY 4.0
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