CVE-2025-53245 identifies a stored Cross-site Scripting (XSS) vulnerability in the Afzal Multani WP Logo Changer WordPress plugin, specifically in the am-login-logo feature. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing malicious scripts to be stored and later executed in the context of users visiting the affected pages. This flaw affects all versions up to and including 1.2. The CVSS v3.1 base score is 5.4 (medium), with an attack vector of network (remote exploitation), low attack complexity, requiring privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), indicating that the vulnerability can affect resources beyond the initially vulnerable component. The impact affects confidentiality and integrity at a low level, with no impact on availability. An attacker with at least low privileges—such as a contributor or subscriber—can exploit this by injecting malicious JavaScript that executes when other users view the compromised content, potentially leading to session hijacking, defacement, or redirection to malicious sites. No patches or known exploits are currently available, but the vulnerability is publicly disclosed and should be addressed promptly. The vulnerability is particularly relevant for WordPress sites using this plugin, which is typically used to customize login logos, a common feature in corporate or community WordPress deployments.

For European organizations, this vulnerability poses a moderate risk primarily to the confidentiality and integrity of web applications using the WP Logo Changer plugin. Exploitation could allow attackers to execute arbitrary scripts in the browsers of users with access to the affected pages, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of legitimate users. While availability is not impacted, the reputational damage and potential data leakage could be significant, especially for organizations handling sensitive user data or operating in regulated sectors such as finance, healthcare, or government. The requirement for low privileges and user interaction means insider threats or compromised accounts could be leveraged to exploit this vulnerability. Additionally, the scope change indicates that the impact could extend beyond the plugin itself, affecting other components or user sessions within the WordPress environment. European organizations with public-facing WordPress sites that use this plugin are at risk of targeted attacks, especially if they have not implemented strict user role management or input sanitization controls.

1. Monitor for an official patch or update from the Afzal Multani WP Logo Changer plugin developer and apply it immediately upon release. 2. Until a patch is available, restrict plugin usage to trusted administrators only and limit the number of users with privileges sufficient to exploit this vulnerability. 3. Implement a Web Application Firewall (WAF) with rules specifically designed to detect and block stored XSS payloads targeting WordPress plugins. 4. Conduct regular security audits and input validation reviews on WordPress sites, focusing on user-generated content and plugin inputs. 5. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content within the WordPress admin interface. 6. Employ Content Security Policy (CSP) headers to reduce the impact of potential XSS attacks by restricting the execution of unauthorized scripts. 7. Regularly backup WordPress sites and maintain incident response plans to quickly recover from any compromise resulting from exploitation.