CVE-2025-53264 in ONet Regenerate Thumbnails Plugin
Summary
by MITRE • 06/27/2025
Cross-Site Request Forgery (CSRF) vulnerability in Konrád Koller ONet Regenerate Thumbnails allows Cross Site Request Forgery. This issue affects ONet Regenerate Thumbnails: from n/a through 1.5.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 06/27/2025
This cross-site request forgery vulnerability exists within the Konrád Koller ONet Regenerate Thumbnails WordPress plugin, specifically impacting versions ranging from an unspecified initial version through 1.5. The flaw allows authenticated administrators to be tricked into executing unintended actions through malicious web requests, representing a critical security risk for WordPress installations. The vulnerability stems from insufficient validation of the origin of requests made to the plugin's administrative endpoints, enabling attackers to craft malicious requests that appear to originate from legitimate administrative sessions.
The technical implementation of this CSRF vulnerability exploits the absence of proper anti-forgery tokens or origin validation mechanisms within the plugin's administrative interfaces. When administrators navigate to compromised websites or click on malicious links, their authenticated browser sessions can be leveraged to perform unauthorized operations within the ONet Regenerate Thumbnails plugin. This includes potentially destructive actions such as thumbnail regeneration, configuration changes, or other administrative functions that the plugin exposes through its web interface. The vulnerability is particularly concerning because it requires no privileged access beyond an existing administrative session, making it exploitable through social engineering techniques or by hosting malicious content on compromised websites.
The operational impact of this vulnerability extends beyond simple data manipulation to potentially compromise entire WordPress installations through unauthorized plugin modifications. Attackers could exploit this flaw to modify plugin configurations, potentially introducing backdoors or disabling security features, or to perform thumbnail regeneration operations that could consume excessive server resources or be used as part of a broader attack strategy. The vulnerability affects the integrity and availability of the affected system, as unauthorized modifications to plugin settings could lead to system instability or provide attackers with persistent access vectors. This represents a significant risk for websites that rely on the ONet Regenerate Thumbnails plugin for image management and optimization services.
Mitigation strategies should prioritize immediate patching of the affected plugin to version 1.5 or later, where the CSRF vulnerability has been addressed through proper implementation of anti-forgery tokens and request origin validation. Administrators should also implement additional security measures including regular security audits of installed plugins, monitoring for unauthorized administrative activities, and ensuring that WordPress core, themes, and plugins are kept current with security updates. The vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery issues, and represents a clear violation of the principle of least privilege and proper authentication validation. Organizations should also consider implementing web application firewalls and security monitoring solutions to detect and prevent exploitation attempts targeting CSRF vulnerabilities in their WordPress environments.