CVE-2025-62880Network attack vector

Unauthorized admin actions via missing nonce validation

Published Dec 22, 2025 · Updated Dec 22, 2025

Cross-site request forgery in Custom 404 Pro 3.12.0 and earlier allows remote attackers to trigger an unauthorized action via a forged request. Public materials identify missing or incorrect nonce validation in an unnamed function but do not disclose the function or resulting action. Exploitation requires tricking an authenticated site administrator into clicking a link, visiting a crafted page, or submitting a form; the reported consequence is limited to an unspecified unauthorized action.

CVSS severity4.3
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Custom 404 Pro 3.12.0 and earlier allows remote attackers to trigger an unauthorized action via a forged request. Public materials identify missing or incorrect nonce validation in an unnamed function but do not disclose the function or resulting action. Exploitation requires tricking an authenticated site administrator into clicking a link, visiting a crafted page, or submitting a form; the reported consequence is limited to an unspecified unauthorized action.

The record

CVE
CVE-2025-62880
Published
Dec 22, 2025
Updated
Dec 22, 2025
Vendor
Kunal Nagar
Product
Custom 404 Pro
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 22, 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=n/a <=3.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kunal Nagar · Custom 404 Proversion=n/a <=3.12.0

Published CVSS scores

4.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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.

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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-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious Link

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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