CVE-2025-7501 identifies a stored Cross-Site Scripting (XSS) vulnerability in the Wonder Slider Lite plugin for WordPress, a widely used tool for creating image sliders on websites. The vulnerability arises from improper neutralization of input during web page generation (CWE-79), specifically in the handling of image title and description fields within the DOM. Versions up to and including 14.4 fail to adequately sanitize or escape user-supplied input, allowing authenticated users with Contributor-level permissions or higher to inject arbitrary JavaScript code. This malicious code is stored persistently and executed whenever any user accesses the compromised page, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of users. The vulnerability does not require user interaction beyond page access but does require the attacker to have authenticated access with at least Contributor privileges, which are commonly granted to users who can submit content but not publish it directly. The CVSS 3.1 base score of 6.4 reflects a medium severity, with network attack vector, low attack complexity, and privileges required. The scope is changed, indicating that the vulnerability affects components beyond the initial vulnerable module, impacting confidentiality and integrity but not availability. No patches or known exploits have been reported at the time of publication, but the vulnerability poses a significant risk to WordPress sites using this plugin, especially those with multiple contributors or less restrictive access controls.

The primary impact of this vulnerability is the compromise of confidentiality and integrity of user data on affected WordPress sites. Attackers with Contributor-level access can inject persistent malicious scripts that execute in the browsers of site visitors and administrators, potentially leading to session hijacking, theft of authentication tokens, unauthorized actions, or distribution of malware. This can undermine trust in the affected websites, lead to data breaches, and facilitate further attacks such as privilege escalation or lateral movement within the site’s infrastructure. Since the vulnerability requires authenticated access, the risk is higher in environments with multiple contributors or where user access controls are lax. The absence of known exploits currently limits immediate widespread impact, but the vulnerability’s presence in a popular plugin increases the likelihood of future exploitation. Organizations relying on Wonder Slider for content presentation face reputational damage, regulatory compliance issues, and operational disruptions if exploited.

To mitigate this vulnerability, organizations should first check for updates or patches from the Wonder Slider plugin vendor and apply them promptly once available. In the absence of official patches, administrators should restrict Contributor-level access to trusted users only and review user permissions to minimize the number of accounts with content submission privileges. Implementing a Web Application Firewall (WAF) with rules to detect and block suspicious script injection attempts in image titles and descriptions can provide interim protection. Additionally, site administrators should enable Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Regular security audits and monitoring of user-generated content for anomalous scripts or HTML can help detect exploitation attempts early. Educating contributors about safe content submission practices and enforcing input validation on the server side can further reduce risk. Finally, consider disabling or replacing the Wonder Slider plugin if timely patches are unavailable and the risk is unacceptable.