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CVE-2026-90939— novel-plus through 5.3.3 Missing Authorization on the Admin /sys/user/list Endpoint

Quick assessment

Affected
201206030 novel-plus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

xxyopen novel-plus是xxyopen个人开发者开源的一个原创文学CMS系统。 xxyopen novel-plus 5.3.3及之前版本存在授权问题漏洞，该漏洞源于/sys/user/list端点缺少适当的权限注解，可能导致经过身份验证的攻击者获取其数据范围内的用户密码哈希及邮箱地址、电话号码等个人数据，进而实施离线哈希破解和账户接管。

CVSS 6.5 · Medium EPSS 0.46% · P40

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
201206030 novel-plus ≤ 5.3.3 affected
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I. Basic Information for CVE-2026-90939

Vulnerability Information
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Vulnerability Title
novel-plus through 5.3.3 Missing Authorization on the Admin /sys/user/list Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
novel-plus through 5.3.3 contains an information disclosure vulnerability in the /sys/user/list endpoint that lacks proper permission annotations. Authenticated attackers can retrieve password hashes and personal data including email addresses and phone numbers for users within their data scope, enabling offline hash cracking and account takeover.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
xxyopen novel-plus 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xxyopen novel-plus是xxyopen个人开发者开源的一个原创文学CMS系统。 xxyopen novel-plus 5.3.3及之前版本存在授权问题漏洞，该漏洞源于/sys/user/list端点缺少适当的权限注解，可能导致经过身份验证的攻击者获取其数据范围内的用户密码哈希及邮箱地址、电话号码等个人数据，进而实施离线哈希破解和账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
201206030 novel-plus 0 ~ 5.3.3 -

II. Public POCs for CVE-2026-90939

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III. Intelligence Information for CVE-2026-90939

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Patches & Fixes for CVE-2026-90939 (1)

Vendor Advisories for CVE-2026-90939 (1)

Proof of Concept for CVE-2026-90939 (1)

Vendor Pages for CVE-2026-90939 (1)

Other References for CVE-2026-90939 (2)

Same Patch Batch · 201206030 · 2026-09-14 · 3 CVEs total

CVE-2026-90940 5.3 MEDIUM novel-plus through 5.3.3 Default Cache Management Password in the Front Portal
CVE-2026-90941 4.3 MEDIUM novel-plus through 5.3.3 Missing Authorization on the Admin Book Download Endpoint

IV. Related Vulnerabilities

Same product: novel-plus
Same vendor: 201206030
Same weakness: CWE-862