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CVE-2025-3986— Apereo CAS CasConfigurationMetadataServerController.java redos

Quick assessment

Affected
Apereo CAS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apereo CAS是Apereo开源的一套基于Web的企业多语言单点登录解决方案。 Apereo CAS 5.2.6版本存在安全漏洞，该漏洞源于文件cas-5.2.6corecas-server-core-configuration-metadata-repositorysrcmainjavaorgapereocasmetadata estCasConfigurationMetadataServerController.java中参数Name导致正则表达式复杂性不足。

CVSS 4.3 · Medium EPSS 0.59% · P46

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-3986

Vulnerability Information
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Vulnerability Title
Apereo CAS CasConfigurationMetadataServerController.java redos
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Apereo CAS 5.2.6. It has been declared as problematic. This vulnerability affects unknown code of the file cas-5.2.6\core\cas-server-core-configuration-metadata-repository\src\main\java\org\apereo\cas\metadata\rest\CasConfigurationMetadataServerController.java. The manipulation of the argument Name leads to inefficient regular expression complexity. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Apereo CAS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apereo CAS是Apereo开源的一套基于Web的企业多语言单点登录解决方案。 Apereo CAS 5.2.6版本存在安全漏洞，该漏洞源于文件cas-5.2.6corecas-server-core-configuration-metadata-repositorysrcmainjavaorgapereocasmetadata estCasConfigurationMetadataServerController.java中参数Name导致正则表达式复杂性不足。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apereo CAS 5.2.6 -

II. Public POCs for CVE-2025-3986

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III. Intelligence Information for CVE-2025-3986

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Vendor Advisories for CVE-2025-3986 (2)

Other References for CVE-2025-3986 (1)

Same Patch Batch · Apereo · 2025-04-27 · 3 CVEs total

CVE-2025-3984 5.0 MEDIUM Apereo CAS Groovy Code RegisteredServiceSimpleFormController.java saveService code injecti
CVE-2025-3985 2.7 LOW Apereo CAS ResponseEntity redos

IV. Related Vulnerabilities

Same product: CAS
Same vendor: Apereo
Same weakness: CWE-1333

V. Comments for CVE-2025-3986

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