Vulnerability · Published Apr 27, 2025 · Assigned by VulDB

CVE-2025-3985Apereo CAS ResponseEntity redos

Low 2.7

In plain English

A low-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 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)2.7Low

Exploit odds (30 days)0.6%top 49.4% 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 classified as problematic. This affects the function ResponseEntity of the file cas-5.2.6\webapp-mgmt\cas-management-webapp-support\src\main\java\org\apereo\cas\mgmt\services\web\ManageRegisteredServicesMultiActionController.java. The manipulation of the argument Query leads to inefficient regular expression complexity. It is possible to initiate the attack 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-management-webapp-support	no fix listed	GHSA-8rx4-fxq5-vj4v

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:H/UI:N/S:U/C:N/I:N/A:L

References

VDB-306321 | Apereo CAS ResponseEntity redos vdb-entry, technical-description
VDB-306321 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #557110 | Apereo CAS v5.2.6 ReDos regular expression engine denial of service third-party-advisory
https://wx.mail.qq.com/s?k=lzDuxVkSRXUZ0bwZEG exploit