CVE-2025-12154: CWE-434 Unrestricted Upload of File with Dangerous Type in moderntribe Auto Thumbnailer
The Auto Thumbnailer plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadThumb() function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Contributor-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
AI Analysis
Technical Summary
CVE-2025-12154 is a vulnerability in the moderntribe Auto Thumbnailer WordPress plugin affecting all versions up to and including 1.0. The issue arises from the uploadThumb() function lacking proper file type validation, enabling authenticated users with Contributor-level permissions or higher to upload arbitrary files. This unrestricted file upload can potentially allow remote code execution on the server hosting the WordPress site. The vulnerability has a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability. No patch or official remediation has been provided yet, and no exploits have been reported in the wild.
Potential Impact
An attacker with Contributor-level or higher access can upload arbitrary files to the server, which may lead to remote code execution. This compromises the confidentiality, integrity, and availability of the affected system. The high CVSS score reflects the significant risk posed by this vulnerability if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the Auto Thumbnailer plugin if possible to reduce exposure.
CVE-2025-12154: CWE-434 Unrestricted Upload of File with Dangerous Type in moderntribe Auto Thumbnailer
Description
The Auto Thumbnailer plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadThumb() function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Contributor-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-12154 is a vulnerability in the moderntribe Auto Thumbnailer WordPress plugin affecting all versions up to and including 1.0. The issue arises from the uploadThumb() function lacking proper file type validation, enabling authenticated users with Contributor-level permissions or higher to upload arbitrary files. This unrestricted file upload can potentially allow remote code execution on the server hosting the WordPress site. The vulnerability has a CVSS 3.1 score of 8.8, indicating high impact on confidentiality, integrity, and availability. No patch or official remediation has been provided yet, and no exploits have been reported in the wild.
Potential Impact
An attacker with Contributor-level or higher access can upload arbitrary files to the server, which may lead to remote code execution. This compromises the confidentiality, integrity, and availability of the affected system. The high CVSS score reflects the significant risk posed by this vulnerability if exploited.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the Auto Thumbnailer plugin if possible to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-10-24T13:06:55.464Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69327172f88dbe026c779911
Added to database: 12/5/2025, 5:45:22 AM
Last enriched: 4/9/2026, 9:16:49 AM
Last updated: 5/10/2026, 12:58:11 AM
Views: 142
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