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MEDIUM severity

CVE-2021-21676 — requests

MEDIUM

CVE-2021-21676 is a medium-severity (CVSS 4.3) CWE-862 vulnerability in org.jenkins-ci.plugins:requests. A fix is available for org.jenkins-ci.plugins:requests — see the affected versions and patch details below.

Missing permission check in Jenkins requests-plugin Plugin allows sending emails

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 30, 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 CVEs72th percentile — riskier than 72% of all scored CVEsHighest risk
0.00%0.63%1.26%1.89%0.0%1.4%Apr 26Aug 26Oct 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:requests

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 requests-plugin Plugin 2.2.7 and earlier does not perform a permission check in an HTTP endpoint.

This allows attackers with Overall/Read permission to send test emails to an attacker-specified email address.

Jenkins requests-plugin Plugin 2.2.8 requires Overall/Administer permission to send test emails.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:requestsall versions2.2.8org.jenkins-ci.plugins:requests:2.2.8

Affected Products

1 product · 1 configurations
Application
requestsjenkins
≤ 2.2.7
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:requests, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:requests to 2.2.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21676 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 requests-plugin Plugin 2.2.7 and earlier does not perform a permission check in an HTTP endpoint. This allows attackers with Overall/Read permission to send test emails to an attacker-specified email address. Jenkins requests-plugin Plugin 2.2.8 requires Overall/Administer permission to send test emails.
O3 Security · Impact-Aware SCA

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CVE-2021-21676: requests — Fixed in 2.2.8