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MEDIUM severity

CVE-2018-1000602 — saml

MEDIUMFix: jenkinsci/saml-plugin@fd95d57

CVE-2018-1000602 is a medium-severity (CVSS 5.9) CWE-384 vulnerability in org.jenkins-ci.plugins:saml. A fix is available for org.jenkins-ci.plugins:saml — see the affected versions and patch details below.

Jenkins SAML Plugin Session Fixation vulnerability

Also known asGHSA-4pjx-86pg-x4j5
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk
0.00%0.45%0.90%1.35%0.0%0.9%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:saml

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

A session fixation vulnerability exists in Jenkins SAML Plugin 1.0.6 and earlier in SamlSecurityRealm.java that allows unauthorized attackers to impersonate another users if they can control the pre-authentication session. SAML Plugin 1.0.7 invalidates the previous session during login and creates a new one.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:samlall versions1.0.7org.jenkins-ci.plugins:saml:1.0.7

Affected Products

1 product · 1 configurations
Application
samljenkins
≤ 1.0.6
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:saml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:saml to 1.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-1000602 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

A session fixation vulnerability exists in Jenkins SAML Plugin 1.0.6 and earlier in SamlSecurityRealm.java that allows unauthorized attackers to impersonate another users if they can control the pre-authentication session. SAML Plugin 1.0.7 invalidates the previous session during login and creates a new one.
O3 Security · Impact-Aware SCA

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CVE-2018-1000602: saml — Fixed in 1.0.7