CVE-2021-21620
Cross-Site Request Forgery in the Jenkins Claim plugin
A cross-site request forgery (CSRF) vulnerability in Jenkins Claim Plugin 2.18.1 and earlier allows attackers to change claims.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
A cross-site request forgery (CSRF) vulnerability in Jenkins Claim Plugin 2.18.1 and earlier allows attackers to change claims.
- Record
CVE-2021-21620- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-352
- Updated
- 2026-11-02
CVE ListNo score
A cross-site request forgery (CSRF) vulnerability in Jenkins Claim Plugin 2.18.1 and earlier allows attackers to change claims.
- Record
CVE-2021-21620- Updated
- 2026-11-02
EUVDEUVD-2021-1259No score
A cross-site request forgery (CSRF) vulnerability in Jenkins Claim Plugin 2.18.1 and earlier allows attackers to change claims.
- Record
EUVD-2021-1259- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4ffq-6g62-j4v4
Cross-Site Request Forgery in the Jenkins Claim plugin
Jenkins Claim Plugin 2.18.1 and earlier does not require POST requests for the form submission endpoint assigning claims, resulting in a cross-site request forgery (CSRF) vulnerability.
This vulnerability allows attackers to change claims.
Jenkins Claim Plugin 2.18.2 requires POST requests for the affected HTTP endpoint.
- Record
GHSA-4ffq-6g62-j4v4- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-352
- Updated
- 2026-11-02
OSV
A cross-site request forgery (CSRF) vulnerability in Jenkins Claim Plugin 2.18.1 and earlier allows attackers to change claims.
- Record
CVE-2021-21620- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-4ffq-6g62-j4v4
Cross-Site Request Forgery in the Jenkins Claim plugin
Jenkins Claim Plugin 2.18.1 and earlier does not require POST requests for the form submission endpoint assigning claims, resulting in a cross-site request forgery (CSRF) vulnerability.
This vulnerability allows attackers to change claims.
Jenkins Claim Plugin 2.18.2 requires POST requests for the affected HTTP endpoint.
- Record
GHSA-4ffq-6g62-j4v4- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - Weakness
- CWE-352
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.jenkins-ci.plugins:claimMaven | before 2.18.2 | 2.18.2 |
org.jenkins-ci.plugins:claimMaven | before 2.18.2, plus listed versions 2.02.12.102.112.12 Show 15 moreShow less2.13.12.142.14.12.152.162.172.182.18.12.22.32.52.62.72.82.9 | 2.18.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21620 is a medium vulnerability (CVSS 4.3) in Jenkins Claim, published February 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.64%, the 76th percentile. Fixed in org.jenkins-ci.plugins:claim 2.18.2.