CVE-2025-12064 identifies a reflected Cross-Site Scripting (XSS) vulnerability in the WP2Social Auto Publish plugin for WordPress, maintained by f1logic. This vulnerability exists in all versions up to and including 2.4.7. The root cause is insufficient sanitization of user-supplied input and inadequate escaping of output when generating web pages, specifically in the handling of PostMessage data. An attacker can craft a malicious URL containing a payload that, when clicked by a victim, causes the victim's browser to execute arbitrary JavaScript code within the context of the vulnerable website. This reflected XSS does not require the attacker to be authenticated but does require user interaction (clicking a link). The vulnerability impacts the confidentiality and integrity of user data by potentially allowing session hijacking, credential theft, or unauthorized actions performed on behalf of the user. Availability is not impacted. The CVSS 3.1 base score is 6.1, reflecting a medium severity level due to network attack vector, low attack complexity, no privileges required, but requiring user interaction and having limited impact on confidentiality and integrity. No patches or exploits are currently publicly available, but the vulnerability is officially published and tracked. The vulnerability is particularly relevant for websites that use WP2Social Auto Publish to automate social media posts, as attackers could leverage this to compromise site visitors or administrators.

For European organizations, this vulnerability poses a moderate risk primarily to the confidentiality and integrity of user sessions and data on WordPress sites using the affected plugin. Attackers could exploit this to steal session cookies, perform actions on behalf of users, or deliver further malware. Organizations relying on automated social media publishing may face reputational damage if attackers manipulate content or compromise user trust. Since the attack requires user interaction, phishing campaigns targeting employees or customers could be a vector. The vulnerability does not impact system availability, but the potential for data leakage and unauthorized actions could lead to regulatory compliance issues under GDPR, especially if personal data is exposed or manipulated. Organizations with high web traffic and social media engagement are at greater risk. The lack of known exploits reduces immediate threat but does not eliminate the risk of future exploitation.

European organizations should prioritize updating the WP2Social Auto Publish plugin to a patched version once released by the vendor. Until then, manual mitigation includes implementing strict input validation and output encoding on all user-supplied data processed by the plugin, particularly data handled via PostMessage. Web application firewalls (WAFs) can be configured to detect and block common XSS payloads targeting this plugin. Security teams should educate users about the risks of clicking untrusted links and implement email filtering to reduce phishing attempts. Regular vulnerability scanning and penetration testing should include checks for reflected XSS in WordPress plugins. Monitoring web logs for suspicious URL patterns related to PostMessage parameters can help detect exploitation attempts. Additionally, applying Content Security Policy (CSP) headers can reduce the impact of XSS by restricting script execution sources. Organizations should also review and limit plugin usage to only necessary features to reduce attack surface.