CVE-2025-64131Network attack vector

Account impersonation via replayed SAML responses

Published Oct 29, 2025 · Updated Oct 29, 2025

Authentication bypass in Jenkins SAML Plugin 4.583.vc68232f7018a_ and earlier allows attackers to impersonate a user via replayed SAML requests. The SAML client accepts a previously observed authentication response because it neither records nor rejects reused message identifiers in a replay cache. Attackers must capture details from a user's browser-to-Jenkins authentication flow, after which the replay grants the targeted user's Jenkins access.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Jenkins SAML Plugin 4.583.vc68232f7018a_ and earlier allows attackers to impersonate a user via replayed SAML requests. The SAML client accepts a previously observed authentication response because it neither records nor rejects reused message identifiers in a replay cache. Attackers must capture details from a user's browser-to-Jenkins authentication flow, after which the replay grants the targeted user's Jenkins access.

The record

CVE
CVE-2025-64131
Published
Oct 29, 2025
Updated
Oct 29, 2025
Vendor
Jenkins Project
Product
Jenkins SAML Plugin
Classifications
CWE-294, CAPEC-60, T1550.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 29, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.583.vc68232f7018a_

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jenkins Project · Jenkins SAML Pluginversion=0 <=4.583.vc68232f7018a_

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
CAPEC-60Reusing Session IDs (aka Session Replay)
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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