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.

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Deploy the Patch

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:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

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