CVE-2025-4279: CWE-434 Unrestricted Upload of File with Dangerous Type in muromuro External image replace
The External image replace plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'external_image_replace_get_posts::replace_post' function in all versions up to, and including, 1.0.8. This makes it possible for authenticated attackers, with contributor-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible.
AI Analysis
Technical Summary
CVE-2025-4279 is a vulnerability in the muromuro External image replace WordPress plugin, affecting all versions up to and including 1.0.8. The issue arises from the lack of file type validation in the 'external_image_replace_get_posts::replace_post' function, enabling authenticated users with contributor or higher privileges to upload arbitrary files. This can potentially lead to remote code execution on the server hosting the WordPress site. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with contributor-level or higher access can upload arbitrary files to the affected WordPress site due to missing file type validation. This can lead to remote code execution, compromising the confidentiality, integrity, and availability of the server and potentially the entire website. The high CVSS score (8.8) reflects the critical nature of this vulnerability in terms of potential damage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, it is recommended to restrict contributor-level access carefully and consider disabling or removing the External image replace plugin if not essential. Monitor for updates from the muromuro project or WordPress plugin repository for an official patch or temporary workaround.
CVE-2025-4279: CWE-434 Unrestricted Upload of File with Dangerous Type in muromuro External image replace
Description
The External image replace plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'external_image_replace_get_posts::replace_post' function in all versions up to, and including, 1.0.8. This makes it possible for authenticated attackers, with contributor-level and above permissions, 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-2025-4279 is a vulnerability in the muromuro External image replace WordPress plugin, affecting all versions up to and including 1.0.8. The issue arises from the lack of file type validation in the 'external_image_replace_get_posts::replace_post' function, enabling authenticated users with contributor or higher privileges to upload arbitrary files. This can potentially lead to remote code execution on the server hosting the WordPress site. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with contributor-level or higher access can upload arbitrary files to the affected WordPress site due to missing file type validation. This can lead to remote code execution, compromising the confidentiality, integrity, and availability of the server and potentially the entire website. The high CVSS score (8.8) reflects the critical nature of this vulnerability in terms of potential damage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, it is recommended to restrict contributor-level access carefully and consider disabling or removing the External image replace plugin if not essential. Monitor for updates from the muromuro project or WordPress plugin repository for an official patch or temporary workaround.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-05-05T05:52:22.721Z
- Cisa Enriched
- true
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 682d981dc4522896dcbdaf34
Added to database: 5/21/2025, 9:08:45 AM
Last enriched: 4/9/2026, 10:21:25 AM
Last updated: 5/8/2026, 4:02:05 PM
Views: 71
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