CVE-2025-26903 in InPost Gallery Plugin
Summary
by MITRE • 04/16/2025
Cross-Site Request Forgery (CSRF) vulnerability in RealMag777 InPost Gallery allows Cross Site Request Forgery. This issue affects InPost Gallery: from n/a through 2.1.4.3.
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Analysis
by VulDB Data Team • 04/16/2025
The Cross-Site Request Forgery vulnerability identified as CVE-2025-26903 resides within the RealMag777 InPost Gallery plugin, representing a critical security flaw that undermines the integrity of web applications. This vulnerability specifically targets the plugin's handling of user requests and authentication mechanisms, creating potential attack vectors that could be exploited by malicious actors. The affected version range spans from an unspecified initial version through 2.1.4.3, indicating that multiple iterations of the plugin contain this flaw and require immediate attention from system administrators and security teams.
The technical nature of this CSRF vulnerability stems from the plugin's failure to implement proper anti-CSRF measures in its request processing workflow. When users interact with the InPost Gallery plugin, the application does not adequately validate or authenticate requests originating from external domains, allowing attackers to craft malicious requests that appear legitimate to the application. This occurs because the plugin relies on cookies or other session-based authentication methods without implementing additional validation tokens or origin checks that would prevent unauthorized request execution. The vulnerability manifests when legitimate users perform actions within the plugin's interface, as attackers can manipulate these requests to execute unintended operations on behalf of authenticated users.
The operational impact of this vulnerability extends beyond simple data theft or modification, as it can enable attackers to perform administrative actions within the affected web application. An attacker could potentially leverage this CSRF flaw to delete gallery items, modify plugin configurations, or even gain elevated privileges within the system. The implications are particularly severe in environments where the InPost Gallery plugin is used for content management or user-generated content systems, as unauthorized modifications could compromise entire websites or applications. This vulnerability also aligns with the common exploitation patterns documented in the ATT&CK framework under the 'Initial Access' and 'Persistence' phases, where attackers establish footholds through web application vulnerabilities.
Mitigation strategies for this CSRF vulnerability should focus on implementing robust anti-CSRF protection mechanisms within the InPost Gallery plugin. The most effective approach involves implementing unique, unpredictable tokens for each user session that must be validated with every request, ensuring that requests originate from legitimate sources within the application. Additionally, the plugin should enforce strict origin validation and implement proper SameSite cookie attributes to prevent cross-domain request forgery. Security teams should also consider implementing Content Security Policy headers and regular security audits to detect similar vulnerabilities. Organizations using the affected plugin versions should immediately update to the latest available release that contains patches for this vulnerability, while also monitoring for any signs of exploitation attempts. This vulnerability demonstrates the critical importance of implementing defense-in-depth strategies and adheres to CWE-352, which specifically addresses Cross-Site Request Forgery vulnerabilities in web applications.