CVE-2025-24399Network attack vector

Account impersonation via case-insensitive username matching

Published Jan 22, 2025 · Updated Mar 18, 2025

Authentication bypass in Jenkins OpenId Connect Authentication Plugin allows remote authenticated users to impersonate other Jenkins users. OicSecurityRealm defaults its user identity strategy to case-insensitive matching, so OIDC claim names that differ only by letter case resolve to the same Jenkins account. The issue affects 4.452.v2849b_d3945fa_ and earlier, except 4.438.440.v3f5f201de5dc, when the provider is case-sensitive; matching an administrator name grants administrator access.

CVSS severity8.8
High
EPSS probability0.55%
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 OpenId Connect Authentication Plugin allows remote authenticated users to impersonate other Jenkins users. OicSecurityRealm defaults its user identity strategy to case-insensitive matching, so OIDC claim names that differ only by letter case resolve to the same Jenkins account. The issue affects 4.452.v2849b_d3945fa_ and earlier, except 4.438.440.v3f5f201de5dc, when the provider is case-sensitive; matching an administrator name grants administrator access.

The record

CVE
CVE-2025-24399
Published
Jan 22, 2025
Updated
Mar 18, 2025
Vendor
Jenkins Project
Product
OpenId Connect Authentication
Classifications
CWE-276, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · OpenId Connect AuthenticationAffected versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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