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MEDIUM severity

Jenkins Slack Notification Plugin missing permission checkGHSA-22xp-7rcx-xp34

MEDIUMFix: jenkinsci/slack-plugin@0268bbe

GHSA-22xp-7rcx-xp34 is a medium-severity (CVSS 4.2) CWE-862 vulnerability in org.jenkins-ci.plugins:slack. A fix is available for org.jenkins-ci.plugins:slack — see the affected versions and patch details below.

Also known asCVE-2019-1003043
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs73th percentile — riskier than 73% of all scored CVEsHighest risk
0.00%0.65%1.31%1.96%0.1%1.4%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:slack

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 Slack Notification Plugin did not perform permission checks on a method implementing form validation. This allowed users with Overall/Read access to Jenkins to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.

Additionally, this form validation method did not require POST requests, resulting in a cross-site request forgery vulnerability.

This form validation method now requires POST requests and Overall/Administer (for global configuration) or Item/Configure permissions (for job configuration).

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:slackall versions2.20org.jenkins-ci.plugins:slack:2.20

Affected Products

1 product · 1 configurations
Application
slack notificationjenkins
≤ 2.19
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:slack, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:slack to 2.20 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-22xp-7rcx-xp34 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 Slack Notification Plugin did not perform permission checks on a method implementing form validation. This allowed users with Overall/Read access to Jenkins to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins. Additionally, this form validation method did not require POST requests, resulting in a cross-site request forgery vulnerability. This form validation method now requires POST requests and Overall/Administer (for global configuration) or Item/Configure permissions (for job conf
O3 Security · Impact-Aware SCA

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Jenkins Slack Notification Plugin missing permission check