CVE-2025-26547 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the My Login Logout Plugin developed by nagarjunsonti, affecting all versions up to and including 2.4. The vulnerability arises because the plugin fails to properly validate requests to sensitive actions, allowing attackers to craft malicious requests that execute with the privileges of an authenticated user. This CSRF flaw facilitates Stored Cross-Site Scripting (XSS), where malicious scripts injected via the plugin persist on the server and execute in the browsers of users visiting the affected site. Stored XSS can lead to session hijacking, credential theft, or further exploitation of the affected web application. The plugin is widely used in WordPress environments to manage user authentication workflows, making this vulnerability relevant to many websites globally. No CVSS score has been assigned yet, and no public exploits have been reported, but the vulnerability is publicly disclosed and should be treated as a serious risk. The lack of patch links suggests that a fix may not yet be available, increasing the urgency for mitigation. The vulnerability requires the victim to be authenticated and visit a malicious page, but no additional user interaction is necessary. The combination of CSRF and stored XSS significantly raises the threat level, as it allows attackers to bypass same-origin policies and execute persistent malicious code.

The impact of CVE-2025-26547 on organizations worldwide can be substantial. Successful exploitation can compromise user accounts by executing unauthorized actions without user consent, undermining the integrity of user sessions. The stored XSS component can lead to persistent malicious code execution, enabling attackers to steal sensitive information such as cookies, session tokens, or credentials, and potentially pivot to further attacks within the network. For organizations relying on the affected plugin for user authentication management, this vulnerability threatens both the confidentiality and integrity of user data and the availability of services if attackers leverage the exploit to disrupt normal operations. The risk is amplified in environments with high user interaction and sensitive data processing, such as e-commerce, financial services, and enterprise portals. Additionally, reputational damage and regulatory compliance issues may arise if user data is compromised. Although no known exploits are currently in the wild, the public disclosure increases the likelihood of future exploitation attempts.

To mitigate CVE-2025-26547, organizations should first verify if they are using the My Login Logout Plugin version 2.4 or earlier. Immediate steps include disabling the plugin if feasible or restricting access to authenticated users with minimal privileges. Implementing Web Application Firewall (WAF) rules to detect and block CSRF attack patterns targeting the plugin’s endpoints can reduce risk. Administrators should enforce strict Content Security Policy (CSP) headers to limit the impact of potential XSS payloads. Monitoring web server logs for unusual POST requests or suspicious referrers can help detect exploitation attempts. Until an official patch is released, consider applying custom nonce or token validation on the plugin’s sensitive actions to prevent unauthorized requests. Educate users about phishing and social engineering risks that could facilitate CSRF attacks. Finally, maintain regular backups and prepare incident response plans to quickly address any compromise resulting from this vulnerability.