CVE-2026-81653 in Photo Gallery Plugin
Summary
by MITRE • 09/20/2026
The Photo Gallery, Sliders, Proofing and WordPress plugin before 4.5.0 does not verify that the user acting on an image owns the gallery it belongs to, allowing users granted its gallery-management capability by an administrator to delete, copy and re-tag any image on the site, including images in galleries belonging to other users.
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Analysis
by VulDB Data Team • 09/20/2026
The vulnerability identified in versions of the Photo Gallery, Sliders, Proofing plugin prior to 4.5.0 represents a critical failure in access control logic within WordPress environments. This flaw stems from an insufficient verification process where the application fails to validate that the authenticated user initiating an action on a specific image actually owns or has explicit permission for the gallery containing that image. In standard web application security, this type of oversight is classified as an insecure direct object reference vulnerability, which falls under CWE-639 in the Common Weakness Enumeration taxonomy. The core technical issue lies in the server-side handling of requests related to image manipulation; while the plugin correctly checks if a user has general gallery management capabilities assigned by an administrator, it neglects to cross-reference this role against the specific ownership or permission scope of the target resource. Consequently, any user with elevated privileges for managing galleries can bypass intended boundaries and interact with media assets outside their designated domain.
From an operational perspective, this lack of object-level authorization allows malicious actors who have obtained legitimate credentials with gallery management rights to perform destructive actions on arbitrary images across the entire site. Specifically, attackers are able to delete, copy, or re-tag any image regardless of which user originally uploaded it or which private gallery it resides in. This capability undermines data integrity and confidentiality within multi-user WordPress installations where distinct users maintain separate content collections. The ability to delete files can lead to denial of service for legitimate owners who lose access to their media assets, while the capacity to copy images facilitates unauthorized distribution of proprietary or sensitive visual content. Furthermore, re-tagging capabilities could be exploited to misattribute authorship or embed malicious metadata into shared resources, potentially affecting downstream processes that rely on accurate image tagging for searchability and organization.
This vulnerability aligns with several techniques documented in the MITRE ATT&CK framework, particularly those related to privilege escalation and lateral movement within a compromised application context. By exploiting this flaw, an attacker can effectively escalate their influence from managing one set of galleries to controlling all media assets on the platform without needing higher-level administrative privileges such as full site administration or file system access. This makes it a potent tool for attackers who have already infiltrated a WordPress instance through other means, allowing them to manipulate core content and potentially disrupt business operations that depend on accurate visual data presentation. The impact is particularly severe in enterprise environments where multiple contributors collaborate on shared media libraries, as the trust model assumed by the plugin design proves fundamentally flawed when subjected to malicious intent from within an authorized user role.
Mitigation strategies must prioritize immediate software updates and rigorous access control reviews. Administrators should upgrade the Photo Gallery, Sliders, Proofing plugin to version 4.5.0 or later, where this authorization check has been corrected to ensure that users can only perform actions on images belonging to galleries they explicitly own or are granted specific permissions for. In addition to patching, organizations employing WordPress plugins with media management features should implement the principle of least privilege by restricting gallery management capabilities to a minimal number of trusted administrators rather than distributing them broadly among content editors. Regular security audits and penetration testing focused on vertical and horizontal privilege escalation can help identify similar flaws in custom or third-party code before they are exploited in production environments.