CVE-2025-4019Network attack vector

Unauthenticated code generation via unguarded genCode endpoint

Published Apr 28, 2025 · Updated Apr 28, 2025

Missing authentication in Novel-Plus at commit 0e156c04b4b7ce0563bef6c97af4476fcda8f160 allows remote attackers to invoke code generation. The genCode method in novel-admin/src/main/java/com/java2nb/common/controller/GeneratorController.java accepts a remote request and invokes the administrative generator without first authenticating the caller. No account or user interaction is required; successful requests expose code-generation functionality, while public sources do not establish broader system compromise.

CVSS severity9.8
Critical
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Novel-Plus at commit 0e156c04b4b7ce0563bef6c97af4476fcda8f160 allows remote attackers to invoke code generation. The genCode method in novel-admin/src/main/java/com/java2nb/common/controller/GeneratorController.java accepts a remote request and invokes the administrative generator without first authenticating the caller. No account or user interaction is required; successful requests expose code-generation functionality, while public sources do not establish broader system compromise.

The record

CVE
CVE-2025-4019
Published
Apr 28, 2025
Updated
Apr 28, 2025
Vendor
xxyopen
Product
Novel-Plus
Classifications
CWE-287, CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0e156c04b4b7ce0563bef6c97af4476fcda8f160

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

xxyopen · Novel-Plusversion=0e156c04b4b7ce0563bef6c97af4476fcda8f160

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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