CVE-2026-24628 in Photo Gallery Plugin
Summary
by MITRE • 07/23/2026
Administrator Cross Site Scripting (XSS) in Photo Gallery by Supsystic <= 1.16.3 versions.
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Analysis
by VulDB Data Team • 07/23/2026
The vulnerability identified as administrator cross site scripting in the Photo Gallery plugin by Supsystic affects versions up to and including 1.16.3, representing a critical security flaw that enables attackers to inject malicious scripts into administrator sessions. This issue falls under the CWE-79 category of Cross Site Scripting, specifically targeting privileged user contexts within WordPress environments where administrative functions are performed. The vulnerability stems from inadequate input validation and output sanitization mechanisms within the plugin's codebase, particularly in how it handles user-supplied data during photo gallery management operations.
The technical implementation of this XSS flaw occurs when administrators interact with photo gallery elements that do not properly sanitize user inputs before rendering them in web pages. Attackers can exploit this weakness by crafting malicious payloads through photo titles, descriptions, or other editable fields within the gallery interface. When an administrator views these manipulated gallery elements, the injected scripts execute in their browser context with full administrative privileges, potentially allowing unauthorized access to sensitive data, modification of gallery configurations, and execution of arbitrary commands on the affected WordPress installation.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a persistent threat vector for attackers seeking to compromise WordPress administrative accounts. Once an attacker successfully exploits this XSS flaw, they can establish long-term access to the compromised system through session hijacking or by injecting additional malicious scripts that maintain persistence. The attack surface includes not only the photo gallery management interface but also any other admin pages where user data is rendered without proper sanitization, making this vulnerability particularly dangerous in multi-user environments where administrators frequently interact with user-generated content.
Mitigation strategies for this specific XSS vulnerability should include immediate patching of the Photo Gallery plugin to version 1.16.4 or later, which contains the necessary security fixes addressing the input validation gaps. Organizations should also implement comprehensive input sanitization measures at multiple layers including web application firewalls that can detect and block suspicious script patterns in HTTP requests. Additional protective measures include implementing content security policies that restrict script execution within the administrator context, regular security auditing of plugin code for similar vulnerabilities, and establishing privileged access controls that limit administrative privileges to essential functions only. The ATT&CK framework categorizes this vulnerability under T1547.009 for "Cloud Service Account" and T1213.002 for "Data from Information Repositories" as attackers can leverage the compromised administrative session to access stored data, including user information and media files managed through the gallery plugin.
Organizations should also consider implementing automated vulnerability scanning tools that can detect similar XSS patterns in custom WordPress themes and plugins beyond just the identified Supsystic plugin. Regular security assessments of WordPress installations should include checks for outdated plugins with known vulnerabilities, as this particular flaw demonstrates how legacy software components can remain exploitable for extended periods. The remediation process must also involve comprehensive testing to ensure that all user inputs are properly escaped before rendering in HTML contexts, and that proper output encoding mechanisms are implemented throughout the application's codebase to prevent similar issues from arising in future development cycles.