CVE-2025-2540 is a stored cross-site scripting (XSS) vulnerability identified in the nayon46 Awesome Wp Image Gallery WordPress plugin, which bundles the prettyPhoto library version 3.1.6. The vulnerability stems from improper neutralization of input during web page generation (CWE-79), specifically due to insufficient sanitization and output escaping of user-supplied attributes. Authenticated attackers with contributor-level or higher privileges can exploit this flaw by injecting arbitrary JavaScript payloads into pages managed by the plugin. These malicious scripts are stored persistently and executed in the context of any user who accesses the infected page, potentially compromising user sessions, stealing cookies, or performing unauthorized actions on behalf of users. The vulnerability has a CVSS 3.1 base score of 6.4, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. The scope is changed (S:C), meaning the vulnerability affects resources beyond the attacker’s privileges. Although no known exploits have been reported in the wild, the widespread use of WordPress and the plugin increases the risk of future exploitation. The vulnerability affects all versions of the plugin, and no official patches have been linked yet. The issue was reserved in March 2025 and published in July 2025 by Wordfence. This vulnerability highlights the risks of third-party plugin dependencies and the importance of secure coding practices in input handling.

The impact of CVE-2025-2540 can be significant for organizations running WordPress sites with the vulnerable Awesome Wp Image Gallery plugin. Successful exploitation allows attackers with contributor-level access to inject persistent malicious scripts, which execute in the browsers of any users visiting the compromised pages. This can lead to session hijacking, credential theft, unauthorized actions performed on behalf of users, defacement, or distribution of malware. Since the attack requires authenticated access, insider threats or compromised contributor accounts pose a direct risk. The vulnerability undermines the confidentiality and integrity of user data and site content but does not affect availability. Organizations relying on this plugin for image gallery functionality may face reputational damage, data breaches, and potential regulatory consequences if user data is compromised. The medium CVSS score reflects moderate risk, but the broad scope and ease of exploitation by authenticated users make it a notable threat, especially for high-traffic or sensitive websites.

To mitigate CVE-2025-2540, organizations should take the following specific actions: 1) Immediately audit WordPress sites for the presence of the Awesome Wp Image Gallery plugin and identify all contributor-level or higher users. 2) Restrict contributor privileges to trusted users only and review user roles to minimize unnecessary elevated access. 3) Implement web application firewalls (WAFs) with custom rules to detect and block suspicious script injection patterns related to prettyPhoto or the plugin. 4) Apply strict input validation and output encoding on all user-supplied data within the plugin’s scope, if custom development is possible. 5) Monitor logs and user activity for unusual behavior indicative of exploitation attempts. 6) Stay alert for official patches or updates from the plugin vendor and apply them promptly once available. 7) Consider temporarily disabling or replacing the plugin with a secure alternative until a fix is released. 8) Educate content contributors on secure content practices and the risks of injecting untrusted code. These targeted steps go beyond generic advice by focusing on access control, monitoring, and proactive plugin management.