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MEDIUM severity

CVE-2021-21631 — cloud-stats

MEDIUMFix: jenkinsci/cloud-stats-plugin@07dd3da

CVE-2021-21631 is a medium-severity (CVSS 4.3) CWE-862 vulnerability in org.jenkins-ci.plugins:cloud-stats. A fix is available for org.jenkins-ci.plugins:cloud-stats — see the affected versions and patch details below.

Missing permission check in Jenkins Cloud Statistics Plugin

Also known asGHSA-xv69-6rf3-w5g2
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs57th percentile — riskier than 57% of all scored CVEsHighest risk
0.00%0.43%0.87%1.30%0.0%0.8%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:cloud-stats

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 Cloud Statistics Plugin 0.26 and earlier does not perform a permission check in an HTTP endpoint.

This allows attackers with Overall/Read permission and knowledge of random activity IDs to view related provisioning exception error messages.

Jenkins Cloud Statistics Plugin 0.27 requires Overall/Administer permission to access provisioning exception error messages.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:cloud-statsall versions0.27org.jenkins-ci.plugins:cloud-stats:0.27

Affected Products

1 product · 1 configurations
Application
cloud statisticsjenkins
≤ 0.26
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:cloud-stats, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:cloud-stats to 0.27 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21631 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

Jenkins Cloud Statistics Plugin 0.26 and earlier does not perform a permission check in an HTTP endpoint. This allows attackers with Overall/Read permission and knowledge of random activity IDs to view related provisioning exception error messages. Jenkins Cloud Statistics Plugin 0.27 requires Overall/Administer permission to access provisioning exception error messages.
O3 Security · Impact-Aware SCA

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CVE-2021-21631: cloud-stats — Fixed in 0.27