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MEDIUM severity

CVE-2021-21647 — electricflow

MEDIUMFix: jenkinsci/electricflow-plugin@597cbb1

CVE-2021-21647 is a medium-severity (CVSS 4.3) vulnerability in org.jenkins-ci.plugins:electricflow. A fix is available for org.jenkins-ci.plugins:electricflow — see the affected versions and patch details below.

Missing permission check in Jenkins CloudBees CD Plugin allows scheduling builds

Also known asGHSA-7rx6-4vwv-432g
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs74th percentile — riskier than 74% of all scored CVEsHighest risk
0.00%0.65%1.30%1.96%0.2%1.5%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

2 pkgs affected
☕org.jenkins-ci.plugins:electricflow☕org.jenkins-ci.plugins:electricflow

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 CloudBees CD Plugin does not perform a permission check in an HTTP endpoint.

This allows attackers with Item/Read permission to schedule builds of projects without having Item/Build permission.

Jenkins CloudBees CD Plugin requires Item/Build permission to schedule builds via its HTTP endpoint.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:electricflowall versions1.1.18.1org.jenkins-ci.plugins:electricflow:1.1.18.1
☕Mavenorg.jenkins-ci.plugins:electricflow≥ 1.1.19&&< 1.1.221.1.22org.jenkins-ci.plugins:electricflow:1.1.22

Affected Products

1 product · 1 configurations
Application
cloudbees cdjenkins
≤ 1.1.21
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:electricflow, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:electricflow to 1.1.18.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21647 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 CloudBees CD Plugin does not perform a permission check in an HTTP endpoint. This allows attackers with Item/Read permission to schedule builds of projects without having Item/Build permission. Jenkins CloudBees CD Plugin requires Item/Build permission to schedule builds via its HTTP endpoint.
O3 Security · Impact-Aware SCA

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CVE-2021-21647: electricflow — Fixed in 1.1.18.1