Information Disclosure in Novel-Plus by Novel Technologies
CVE-2026-90939

7.1HIGH

Key Information:

Vendor

201206030

Status
Novel-plus
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90939?

The Novel-Plus application through version 5.3.3 contains a significant information disclosure vulnerability at the /sys/user/list endpoint, where inadequate permission annotations allow authenticated attackers to access sensitive user data. This flaw enables attackers to retrieve password hashes alongside personal information, such as email addresses and phone numbers, which can lead to offline hash cracking and potential account takeovers. It is crucial for users of this service to be aware of this vulnerability and take appropriate measures to secure their accounts.

Affected Version(s)

novel-plus 0 <= 5.3.3

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-2026-90939 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/master...
exploit
https://github.com/201206030/novel-plus/blob/d63c3ee39465...
technical-description
https://github.com/201206030/novel-plus/blob/d63c3ee39465...
technical-description

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
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

Mingsheng Lin
.