CVE-2023-51350Public exploitNetwork attack vector

Audit-log spoofing via trusted forwarded address

Published Jan 11, 2024 · Updated Jun 16, 2025

IP-address spoofing in UJCMS 8.0.2 allows remote attackers to falsify client addresses recorded in application logs. Servlets.java trusts the leftmost X-Forwarded-For value after walking the proxy list from right to left, without verifying that the header came from a trusted proxy. Unauthenticated HTTP requests can therefore corrupt audit attribution; the published proof does not demonstrate sensitive-data disclosure or code execution.

CVSS severity9.8
Critical
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IP-address spoofing in UJCMS 8.0.2 allows remote attackers to falsify client addresses recorded in application logs. Servlets.java trusts the leftmost X-Forwarded-For value after walking the proxy list from right to left, without verifying that the header came from a trusted proxy. Unauthenticated HTTP requests can therefore corrupt audit attribution; the published proof does not demonstrate sensitive-data disclosure or code execution.

The record

CVE
CVE-2023-51350
Published
Jan 11, 2024
Updated
Jun 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-290, CWE-291, T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
CWE-291Reliance on IP Address for Authentication
T1036Masquerading

Public exploit references

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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