Authentication Bypass in Novel-plus by xxyopen
CVE-2025-6533

6.3MEDIUM

Key Information:

Vendor: Xxyopen
Status: Novel-plus
Vendor: CVE Published:; 24 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6533?

A significant vulnerability has been identified in the Novel-plus product by xxyopen, specifically in the ajaxLogin function of the CATCHA Handler. This flaw allows for an unauthorized authentication bypass through a capture-replay attack method, enabling potential remote access to sensitive areas of the application. Attackers may find it challenging to exploit this vulnerability, but the risk is compounded as public disclosure of the exploit has taken place. Despite early notifications to the vendor about this vulnerability, no response has been received.

Affected Version(s)

novel-plus 5.1.0

novel-plus 5.1.1

novel-plus 5.1.2

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-2025-6533 - Proof of Concept

References

https://vuldb.com/?id.313652

vdb-entrytechnical-description

https://vuldb.com/?ctiid.313652

signaturepermissions-required

https://vuldb.com/?submit.596481

third-party-advisory

CVSS V4

Score:

6.3

Severity:

MEDIUM

Confidentiality:

Low

Integrity:

Low

Availability:

Low

Attack Vector:

Network

Attack Complexity:

High

Attack Required:

None

Privileges Required:

Undefined

User Interaction: