CVE-2025-63040Public exploitNetwork attack vector

License-state manipulation via missing nonce validation

Published Dec 31, 2025 · Updated Dec 31, 2025

CSRF in Post Snippets 4.0.11 and earlier allows remote attackers to alter plugin license state through an administrator's browser. The Freemius _activate_license() path accepts the fs_action request parameter and processes license operations without validating a WordPress nonce. Exploitation requires an authenticated administrator to submit a forged request; the demonstrated consequence is unauthorized license activation or deactivation, not site compromise.

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

CSRF in Post Snippets 4.0.11 and earlier allows remote attackers to alter plugin license state through an administrator's browser. The Freemius _activate_license() path accepts the fs_action request parameter and processes license operations without validating a WordPress nonce. Exploitation requires an authenticated administrator to submit a forged request; the demonstrated consequence is unauthorized license activation or deactivation, not site compromise.

The record

CVE
CVE-2025-63040
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
Fullworks Plugins
Product
Post Snippets
Classifications
CWE-352, CAPEC-62, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 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 <=4.0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fullworks Plugins · Post Snippetsversion=n/a <=4.0.11

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 exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001Malicious 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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