What is CVE-2018-1000602?

CVE-2018-1000602 is a medium-severity vulnerability in Jenkins Saml, classified under Session Fixation. CVSS score: 5.9/10. Published 2018-06-26.

How severe is CVE-2018-1000602?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Jenkins Saml

CVE-2018-1000602

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.

Published 2018-06-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Jenkins Saml

Weakness classification (CWE)

CWE-384 — Session Fixation

References

jenkins.io/security/advisory/2018-06-25/ (Vendor Advisory)

Frequently asked questions

What is CVE-2018-1000602?: CVE-2018-1000602 is a medium-severity vulnerability in Jenkins Saml, classified under Session Fixation. CVSS score: 5.9/10. Published 2018-06-26.
How severe is CVE-2018-1000602?: Medium severity. CVSS v3 base score is 5.9 out of 10.