CVE-2021-21684

Description

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.38%
Vendor Advisory jenkins.io
Affected: Jenkins project Jenkins Git Plugin
Published at:
Updated at:

References

Link Tags
https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499 vendor advisory
http://www.openwall.com/lists/oss-security/2021/10/06/1 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-21684?
CVE-2021-21684 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21684?
To fix CVE-2021-21684, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21684 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21684 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21684?
CVE-2021-21684 affects Jenkins project Jenkins Git Plugin.
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