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VulnerabilityPublished Updated

CVE-2025-64131: Jenkins SAML Plugin · CWE-294

Affects Jenkins SAML PluginSource CVE Database V5

0

Not known to be exploited · CVSS 7.5 High.

Data as of 26 Oct 2026, 15:59 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Jenkins Project Jenkins SAML PluginAffected
  • =0
Fixed in–

AI-suggested

  1. Monitor Jenkins SAML Plugin vendor announcements closely and apply security patches immediately once available to address the replay cache deficiency.
  2. Implement network-level protections such as TLS encryption for all SAML traffic to prevent interception and replay of authentication messages.
  3. Use web application firewalls (WAFs) and intrusion detection/prevention systems (IDS/IPS) to detect and block suspicious replay attempts or anomalous authentication patterns.
  4. Enforce strict session management policies in Jenkins, including short session lifetimes and multi-factor authentication (MFA) where possible, to reduce the impact of replayed sessions.
  5. Conduct regular audits of Jenkins authentication logs to identify repeated or unusual login attempts indicative of replay attacks.
  6. Segment Jenkins infrastructure within secure network zones to limit exposure to potential attackers capable of intercepting SAML traffic.
  7. Educate development and operations teams about the risks of replay attacks and encourage vigilance regarding suspicious authentication behaviors.
  8. Consider alternative or additional authentication mechanisms that provide replay protection until the plugin is patched.

Description

Jenkins SAML Plugin 4.583.vc68232f7018a_ and earlier does not implement a replay cache, allowing attackers able to obtain information about the SAML authentication flow between a user's web browser and Jenkins to replay those requests, authenticating to Jenkins as that user.

References

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