CVE-2026-6261: CWE-434 Unrestricted Upload of File with Dangerous Type in MuffinGroup Betheme
The Betheme theme for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 28.4. This is due to the upload_icons() function workflow moving and unzipping user-controlled ZIP files into a public uploads directory without validating extracted file types. This makes it possible for authenticated attackers, with author-level access and above, to upload arbitrary files (including PHP) and achieve remote code execution via the Icons icon-pack upload flow.
AI Analysis
Technical Summary
CVE-2026-6261 is an arbitrary file upload vulnerability in the Betheme WordPress theme (up to version 28.4) caused by insufficient validation in the upload_icons() function. This function moves and extracts user-supplied ZIP files into a public directory without verifying the extracted file types, allowing authenticated users with author-level access or higher to upload malicious files, including executable PHP scripts. Successful exploitation can result in remote code execution, compromising the affected WordPress installation.
Potential Impact
An attacker with author-level or higher privileges can upload arbitrary files, including PHP scripts, leading to remote code execution. This compromises the confidentiality, integrity, and availability of the affected system. The vulnerability has a high CVSS score (8.8), indicating significant impact if exploited. No known exploits in the wild have been reported so far.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict author-level access to trusted users only and consider disabling the icon-pack upload feature if possible. Monitor for updates from MuffinGroup regarding patches or official mitigations.
CVE-2026-6261: CWE-434 Unrestricted Upload of File with Dangerous Type in MuffinGroup Betheme
Description
The Betheme theme for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 28.4. This is due to the upload_icons() function workflow moving and unzipping user-controlled ZIP files into a public uploads directory without validating extracted file types. This makes it possible for authenticated attackers, with author-level access and above, to upload arbitrary files (including PHP) and achieve remote code execution via the Icons icon-pack upload flow.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6261 is an arbitrary file upload vulnerability in the Betheme WordPress theme (up to version 28.4) caused by insufficient validation in the upload_icons() function. This function moves and extracts user-supplied ZIP files into a public directory without verifying the extracted file types, allowing authenticated users with author-level access or higher to upload malicious files, including executable PHP scripts. Successful exploitation can result in remote code execution, compromising the affected WordPress installation.
Potential Impact
An attacker with author-level or higher privileges can upload arbitrary files, including PHP scripts, leading to remote code execution. This compromises the confidentiality, integrity, and availability of the affected system. The vulnerability has a high CVSS score (8.8), indicating significant impact if exploited. No known exploits in the wild have been reported so far.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict author-level access to trusted users only and consider disabling the icon-pack upload feature if possible. Monitor for updates from MuffinGroup regarding patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-04-13T23:57:52.714Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f9d9cccbff5d8610f3c08d
Added to database: 5/5/2026, 11:51:40 AM
Last enriched: 5/5/2026, 12:06:20 PM
Last updated: 6/19/2026, 2:03:32 AM
Views: 81
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