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☕ Maven
Not in CISA KEV
HIGH severity

CVE-2020-2120 — fitnesse

HIGHFix: jenkinsci/fitnesse-plugin@7a913b9

CVE-2020-2120 is a high-severity (CVSS 8.8) XML External Entity (XXE) vulnerability in org.jenkins-ci.plugins:fitnesse. A fix is available for org.jenkins-ci.plugins:fitnesse — see the affected versions and patch details below.

XXE vulnerability in FitNesse Plugin

Also known asGHSA-c3cg-mv5w-cvw8
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 ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs67th percentile — riskier than 67% of all scored CVEsHighest risk
0.00%0.55%1.10%1.65%0.1%1.1%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:fitnesse

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

FitNesse Plugin 1.30 and earlier does not configure the XML parser to prevent XML external entity (XXE) attacks.

This allows a user able to control the input files for its post-build step to have Jenkins parse a crafted file that uses external entities for extraction of secrets from the Jenkins controller, server-side request forgery, or denial-of-service attacks.

FitNesse Plugin 1.31 disables external entity processing for its XML parser.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:fitnesseall versions1.31org.jenkins-ci.plugins:fitnesse:1.31

Affected Products

1 product · 1 configurations
Application
fitnessejenkins
≤ 1.30
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:fitnesse, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:fitnesse to 1.31 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-2120 is resolved across your whole dependency graph.

  3. Workarounds

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

FitNesse Plugin 1.30 and earlier does not configure the XML parser to prevent XML external entity (XXE) attacks. This allows a user able to control the input files for its post-build step to have Jenkins parse a crafted file that uses external entities for extraction of secrets from the Jenkins controller, server-side request forgery, or denial-of-service attacks. FitNesse Plugin 1.31 disables external entity processing for its XML parser.
O3 Security · Impact-Aware SCA

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CVE-2020-2120: fitnesse SSRF — Fixed in 1.31