Denial of Service Vulnerability in Apereo CAS by Apereo
CVE-2025-3985

5.1MEDIUM

Key Information:

Vendor

Apereo

Status
Cas
Vendor
CVE Published:
27 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3985?

A vulnerability has been identified in Apereo CAS version 5.2.6 that allows remote attackers to exploit inefficient regular expression complexity in the ResponseEntity function. This could lead to a denial of service, as the vulnerability can be triggered by manipulating query arguments. The exploit has been publicly disclosed, raising concerns for users of this version. Despite early disclosure to the vendor, no response has been received, highlighting the urgency for affected users to secure their installations.

Affected Version(s)

CAS 5.2.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-3985 - Proof of Concept

References

https://vuldb.com/?id.306321
vdb-entrytechnical-description
https://vuldb.com/?ctiid.306321
signaturepermissions-required
https://vuldb.com/?submit.557110
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

caichaoxiong (VulDB User)
.