CVE-2025-58251 is a Missing Authorization vulnerability (CWE-862) found in the POSIMYTH Sticky Header Effects plugin for Elementor, a popular WordPress page builder. This vulnerability arises due to incorrectly configured access control security levels, allowing an attacker with some level of privileges (PR:L - privileges required: low) to exploit missing authorization checks. The affected versions include all versions up to 2.1.2, with no specific version range provided. The vulnerability does not require user interaction (UI:N) and can be exploited remotely over the network (AV:N). The impact is limited to integrity (I:L) with no confidentiality or availability impact. Specifically, an attacker could perform unauthorized actions or modifications within the plugin's functionality, potentially altering sticky header effects or related settings without proper permission. The CVSS v3.1 base score is 4.3, categorized as medium severity. There are no known exploits in the wild and no patches currently linked, indicating that remediation might still be pending or in progress. The vulnerability affects the plugin's access control mechanisms, which are critical for ensuring that only authorized users can make changes to the website's UI components managed by the plugin.

For European organizations, especially those relying on WordPress websites with the Elementor page builder and the POSIMYTH Sticky Header Effects plugin installed, this vulnerability could lead to unauthorized modifications of website appearance or behavior. While the impact is limited to integrity and does not directly compromise sensitive data or availability, unauthorized changes to UI elements can damage brand reputation, cause user confusion, or be leveraged as part of a broader attack chain (e.g., defacement or social engineering). Organizations in sectors such as e-commerce, media, and public services that maintain customer-facing websites could face reputational harm or loss of user trust. Given the medium severity and the requirement for low privileges, attackers might exploit this vulnerability if they gain limited access, such as through compromised low-privilege accounts or other vulnerabilities. The lack of known exploits currently reduces immediate risk, but the absence of patches means the threat could escalate if exploited in the future.

1. Immediate mitigation should include auditing user roles and permissions within WordPress to ensure that only trusted users have access to modify plugin settings or UI components. 2. Disable or remove the POSIMYTH Sticky Header Effects plugin if it is not essential to reduce attack surface. 3. Monitor for updates from the vendor and apply patches promptly once available. 4. Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting the plugin's endpoints. 5. Conduct regular security reviews and penetration testing focusing on access control mechanisms in WordPress plugins. 6. Employ the principle of least privilege for all user accounts to limit potential exploitation. 7. Maintain comprehensive logging and alerting on changes to website UI components to detect unauthorized modifications quickly.