CVE-2025-13408 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Foxtool All-in-One WordPress plugin, which provides features such as a contact chat button, custom login, and media image optimization. The vulnerability exists in all versions up to and including 2.5.2 due to missing or incorrect nonce validation in the foxtool_login_google() function. Nonces are security tokens used to verify that requests originate from legitimate users; their absence or misconfiguration allows attackers to craft malicious requests that can be executed by authenticated administrators without their knowledge. Specifically, an attacker can trick a site administrator into clicking a specially crafted link, which triggers an OAuth connection establishment without proper authorization. This can lead to unauthorized linkage of OAuth accounts, potentially enabling further attacks such as privilege escalation or unauthorized access to connected services. The vulnerability requires no prior authentication but does require user interaction (clicking a link). The CVSS v3.1 base score is 4.3, reflecting medium severity with network attack vector, low attack complexity, no privileges required, but user interaction needed, and limited impact on integrity only. No patches or known exploits are currently available, indicating the importance of proactive mitigation. The vulnerability is cataloged under CWE-352, a common web application security weakness related to CSRF attacks.

For European organizations, this vulnerability poses a risk primarily to the integrity of WordPress-based websites that utilize the Foxtool All-in-One plugin. Successful exploitation could allow attackers to establish unauthorized OAuth connections, potentially enabling further unauthorized actions or access to connected third-party services. This could lead to unauthorized modifications of site configurations or user accounts, undermining trust and potentially exposing sensitive operational data indirectly. Although confidentiality and availability impacts are not directly indicated, the integrity compromise could cascade into broader security incidents. Organizations in sectors with high reliance on WordPress for customer interaction, such as e-commerce, media, and public services, may face reputational damage and regulatory scrutiny under GDPR if unauthorized access leads to data breaches. The requirement for administrator interaction reduces the likelihood of widespread automated exploitation but does not eliminate targeted social engineering risks. The absence of known exploits in the wild suggests a window for remediation before active attacks emerge.

1. Immediate mitigation should focus on updating the Foxtool All-in-One plugin to a version that includes proper nonce validation once available from the vendor. 2. Until a patch is released, restrict administrative access to trusted networks and users to minimize exposure. 3. Implement Content Security Policy (CSP) and SameSite cookie attributes to reduce CSRF attack surface. 4. Educate administrators and privileged users about the risks of clicking unsolicited or suspicious links, emphasizing social engineering awareness. 5. Monitor web server and application logs for unusual OAuth connection requests or unexpected administrative actions. 6. Consider deploying Web Application Firewalls (WAF) with custom rules to detect and block forged requests targeting the vulnerable function. 7. Conduct regular security audits of WordPress plugins and configurations to identify and remediate similar vulnerabilities proactively. 8. Employ multi-factor authentication (MFA) for administrative accounts to reduce the impact of compromised OAuth connections.