Vulnerability · Published Apr 27, 2025 · Assigned by VulDB

CVE-2025-3986Apereo CAS CasConfigurationMetadataServerController.java redos

Medium 4.3

In plain English

A medium-severity regular-expression denial of service in CAS from Apereo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.7%top 48.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	org.apereo.cas:cas-server-core-configuration-metadata-repository	no fix listed	GHSA-mvwq-hcrj-f5x9

Affected products (as reported)

Vendor	Product	Versions
Apereo	CAS	5.2.6

Weakness: CWE-1333, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References

VDB-306322 | Apereo CAS CasConfigurationMetadataServerController.java redos vdb-entry, technical-description
VDB-306322 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #557473 | Apereo CAS v5.2.6 ReDos Denial of Service third-party-advisory
https://wx.mail.qq.com/s?k=rk-m8GwRMVMcOjBY1a exploit