Vulnerability CVE-2021-21660
Published: 2021-05-25

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.

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Jenkins -> Markdown formatter 

 References:
https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2198
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-21660
http://www.openwall.com/lists/oss-security/2021/05/25/3
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