Vulnerability · Published May 25, 2021 · Assigned by jenkins
CVE-2021-21660
Medium 5.4
In plain English
A medium-severity security flaw in Jenkins Markdown Formatter Plugin from Jenkins project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.4Medium
Exploit odds (30 days)1.1%top 34.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | io.jenkins.plugins:markdown-formatter | 0.2.0 | GHSA-xqpp-26pp-2365 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Jenkins project | Jenkins Markdown Formatter Plugin | unspecified – through 0.1.0 |
References
- https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2198 x_refsource_CONFIRM
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660 x_refsource_MISC
- [oss-security] 20210525 Multiple vulnerabilities in Jenkins plugins mailing-list, x_refsource_MLIST