CVE-2025-62891 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Off-Canvas Sidebars & Menus (Slidebars) plugin developed by Jory Hogeveen, affecting all versions up to and including 0.5.8.5. CSRF vulnerabilities occur when an attacker tricks an authenticated user into submitting a forged request to a web application, causing the application to perform unwanted actions on behalf of the user. In this case, the Slidebars plugin does not adequately verify the origin or authenticity of requests that trigger changes in the off-canvas sidebar or menu states. The vulnerability is exploitable remotely over the network (AV:N), requires low attack complexity (AC:L), does not require privileges (PR:N), but does require user interaction (UI:R), and affects confidentiality, integrity, and availability (C:H/I:H/A:H). This means an attacker can craft malicious web pages or links that, when visited by an authenticated user, can manipulate the sidebar/menu state or potentially execute further malicious actions, leading to unauthorized data access, modification, or denial of service. The plugin is commonly used in WordPress environments to enhance user interface navigation, making it a popular target. No patches or exploit code are currently publicly available, but the vulnerability is officially published and tracked. The lack of built-in CSRF protections in the plugin indicates a design oversight that must be addressed promptly to prevent exploitation.

For European organizations, this vulnerability poses significant risks, especially those relying on WordPress sites with the Slidebars plugin for user interface functionality. Exploitation could lead to unauthorized changes in website behavior, data leakage, or disruption of services, impacting customer trust and regulatory compliance, particularly under GDPR. Attackers could leverage CSRF to perform administrative actions if users with elevated privileges are targeted, potentially leading to full site compromise. The high CVSS score reflects the broad impact on confidentiality, integrity, and availability. Given the widespread use of WordPress in Europe, including government, education, and commercial sectors, the threat could affect a large number of organizations. Additionally, the requirement for user interaction means phishing or social engineering campaigns could be used to facilitate attacks. The absence of known exploits currently provides a window for proactive mitigation, but the risk of future exploitation remains high.

Organizations should immediately inventory their web assets to identify any use of the Slidebars plugin up to version 0.5.8.5. Since no official patches are currently linked, administrators should monitor vendor channels for updates and apply patches promptly once available. In the interim, implement web application firewall (WAF) rules to detect and block suspicious CSRF attempts targeting Slidebars endpoints. Enforce strict anti-CSRF tokens on all state-changing requests within the web application, ensuring that any request modifying sidebar or menu states requires a valid token. Limit the use of privileged accounts and educate users about phishing risks to reduce the likelihood of successful social engineering. Additionally, consider disabling or replacing the plugin with alternatives that follow secure coding practices. Regular security audits and penetration testing focusing on CSRF vulnerabilities should be conducted to identify and remediate similar issues.