CVE-2024-3666 identifies a stored cross-site scripting vulnerability in the Opal Estate Pro – Property Management and Submission plugin for WordPress, versions up to and including 1.7.6. The vulnerability stems from improper neutralization of alternate XSS syntax (CWE-87) in the agent latitude and longitude parameters. Specifically, the plugin fails to adequately sanitize and escape these inputs before storing and rendering them on web pages. This allows an authenticated attacker with contributor-level or higher privileges to inject arbitrary JavaScript code into pages managed by the plugin. When other users access these pages, the malicious scripts execute in their browsers, potentially compromising session tokens, redirecting users, or performing unauthorized actions on their behalf. The vulnerability requires authentication but no further user interaction, and the attack scope is limited to sites using this plugin. The CVSS v3.1 score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, privileges required, no user interaction, and impact on confidentiality and integrity but not availability. No patches or fixes are currently linked, and no known exploits have been reported in the wild as of the publication date. The vulnerability highlights the importance of proper input validation and output encoding in WordPress plugins, especially those handling user-generated content and geolocation data.

The primary impact of CVE-2024-3666 is the potential compromise of user confidentiality and integrity on affected WordPress sites using the Opal Estate Pro plugin. Attackers with contributor-level access can inject malicious scripts that execute in the context of other users' browsers, leading to session hijacking, theft of sensitive information, unauthorized actions, or site defacement. This can damage organizational reputation, lead to data breaches, and facilitate further attacks such as privilege escalation or malware distribution. Since the vulnerability requires authenticated access, the risk is higher in environments where contributor or higher roles are assigned to untrusted or compromised users. The lack of availability impact reduces the risk of denial-of-service, but the confidentiality and integrity risks remain significant. Organizations relying on this plugin for real estate management may face targeted attacks aiming to manipulate listings or user data. The absence of known exploits in the wild suggests limited current exploitation but does not preclude future attacks once exploit code becomes available.

To mitigate CVE-2024-3666, organizations should first check for and apply any official patches or updates from the plugin vendor once available. In the absence of patches, administrators should restrict contributor and higher privileges to trusted users only and review user roles to minimize the number of users who can inject content. Implementing a Web Application Firewall (WAF) with rules to detect and block suspicious script injections in latitude and longitude parameters can provide temporary protection. Additionally, site owners should audit and sanitize existing data stored via these parameters to remove any malicious scripts. Employing Content Security Policy (CSP) headers can help limit the impact of injected scripts by restricting script execution sources. Regular security scanning and monitoring for unusual activity related to the plugin's pages are recommended. Finally, consider alternative plugins with better security track records if timely patching is not feasible.