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Medium severity · published Oct 6, 2021
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…
6.1
CVSS
1.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
Git · Jenkins
through 4.8.2 · source: NVD
Affected product
GI
Git
Jenkins
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21684
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21684
Mailing List
http://www.openwall.com/lists/oss-security/2021/10/06/1
Vendor Advisory
https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2499
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