GHSA-xqpp-26pp-2365

XSS vulnerability in Jenkins Markdown Formatter Plugin

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-21660

Packages

Ecosystem	Package	Affected	Fixed in
Maven	io.jenkins.plugins:markdown-formatter	< 0.2.0	0.2.0

Details

As written in the advisory (Markdown source, shown as plain text).

Jenkins Markdown Formatter Plugin 0.1.0 and earlier uses a Markdown library to parse Markdown that does not escape crafted link target URLs. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with the ability to edit any description rendered using the configured markup formatter. Jenkins Markdown Formatter Plugin 0.2.0 uses a different Markdown library that is not affected by this problem.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2021-21660 advisory
https://github.com/jenkinsci/markdown-formatter-plugin/commit/6b283a5bba3424fd5174b92e7ad8724cdbdf596c web
https://github.com/jenkinsci/markdown-formatter-plugin package
https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2198 web
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660 web
http://www.openwall.com/lists/oss-security/2021/05/25/3 web