CVE-2025-12181: ContentStudio <= 1.3.7 - Authenticated (Author+) Arbitrary File Upload

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-05 · updated 2026-10-18
Weakness: CWE-434

Description

The ContentStudio plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the cstu_update_post() function in all versions up to, and including, 1.3.7. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible. CVE-2025-67910 is likely a duplicate of this.

Affected products

ContentStudio: through 1.3.7

References

https://plugins.trac.wordpress.org/changeset/3412182/
https://wordpress.org/plugins/contentstudio/
https://www.wordfence.com/threat-intel/vulnerabilities/id/5b92b0a4-7ebf-43b3-837b-ad710e5e35ff?source=cve

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