CVE-2026-24966Public exploitNetwork attack vector

Unauthorized plagiarism checks via missing AJAX nonce

Published Feb 3, 2026 · Updated Feb 3, 2026

Cross-site request forgery in Copyscape Premium WordPress Plugin 1.4.1 and earlier allows remote attackers to trigger checks on arbitrary posts. The ajax_copyscape_post handler accepts a post identifier through admin-ajax.php without validating the request's CSRF nonce. Exploitation requires an administrator who can edit the targeted post to visit attacker-controlled content; the forced check can consume Copyscape API resources.

CVSS severity4.3
Medium
EPSS probability0.11%
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 Copyscape Premium WordPress Plugin 1.4.1 and earlier allows remote attackers to trigger checks on arbitrary posts. The ajax_copyscape_post handler accepts a post identifier through admin-ajax.php without validating the request's CSRF nonce. Exploitation requires an administrator who can edit the targeted post to visit attacker-controlled content; the forced check can consume Copyscape API resources.

The record

CVE
CVE-2026-24966
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
Copyscape
Product
Copyscape Premium WordPress Plugin
Classifications
CWE-352, CAPEC-62, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2026Record 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 <=<= 1.4.1 changes=[{"at":"1.4.2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Copyscape · Copyscape Premium WordPress Pluginversion=n/a <=<= 1.4.1 changes=[{"at":"1.4.2","status":"unaffected"}]

Published CVSS scores

4.3CISA-ADPCVSS: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.

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-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001User Execution: Malicious Link

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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