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Not in CISA KEV
HIGH severity

CVE-2021-21617 — configurationslicing

HIGHFix: jenkinsci/configurationslicing-plugin@b22b82d

CVE-2021-21617 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in org.jenkins-ci.plugins:configurationslicing. A fix is available for org.jenkins-ci.plugins:configurationslicing — see the affected versions and patch details below.

CSRF vulnerability in Jenkins Configuration Slicing Plugin

Also known asGHSA-42mm-x828-56c7
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.00%0.48%0.96%1.44%0.1%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.jenkins-ci.plugins:configurationslicing

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Jenkins Configuration Slicing Plugin 1.51 and earlier does not require POST requests for the form submission endpoint reconfiguring slices, resulting in a cross-site request forgery (CSRF) vulnerability.

This vulnerability allows attackers to apply different slice configurations to attacker-specified jobs.

Jenkins Configuration Slicing Plugin 1.52 requires POST requests for the affected HTTP endpoint.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:configurationslicingall versions1.52org.jenkins-ci.plugins:configurationslicing:1.52

Affected Products

1 product · 1 configurations
Application
configuration slicingjenkins
≤ 1.51
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:configurationslicing, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:configurationslicing to 1.52 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21617 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

Jenkins Configuration Slicing Plugin 1.51 and earlier does not require POST requests for the form submission endpoint reconfiguring slices, resulting in a cross-site request forgery (CSRF) vulnerability. This vulnerability allows attackers to apply different slice configurations to attacker-specified jobs. Jenkins Configuration Slicing Plugin 1.52 requires POST requests for the affected HTTP endpoint.
O3 Security · Impact-Aware SCA

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CVE-2021-21617: configurationslicing CSRF — Fixed in 1.52