Vulnerability Details : CVE-2021-21684
Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause, resulting in a stored cross-site scripting (XSS) vulnerability.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-21684
- cpe:2.3:a:jenkins:git:*:*:*:*:*:jenkins:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-21684
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 36 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-21684
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-21684
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: jenkinsci-cert@googlegroups.com (Secondary)
-
The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-21684
-
http://www.openwall.com/lists/oss-security/2021/10/06/1
oss-security - Multiple vulnerabilities in Jenkins and Jenkins pluginsMailing List;Third Party Advisory
-
https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499
Jenkins Security Advisory 2021-10-06Vendor Advisory
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