CVE-2025-66070 identifies a missing authorization vulnerability in the wpForo Forum plugin developed by Tomdever, affecting all versions up to and including 2.4.10. The vulnerability stems from incorrectly configured access control mechanisms that fail to properly verify whether a user has the necessary permissions to perform certain actions within the forum software. This flaw allows an unauthenticated attacker to remotely send crafted requests that modify forum content or settings without any authentication or user interaction. The vulnerability impacts the integrity of the forum data but does not affect confidentiality or availability. The CVSS 3.1 base score of 7.5 reflects the network attack vector, low attack complexity, no privileges required, and no user interaction needed, with a scope limited to the vulnerable component. No known exploits have been observed in the wild yet, but the potential for unauthorized data manipulation poses a significant risk to organizations relying on wpForo for community engagement. The lack of a patch link indicates that a fix may not have been released at the time of this report, emphasizing the need for immediate mitigation steps.

For European organizations, this vulnerability could lead to unauthorized modification of forum content, including posts, user roles, or configurations, potentially damaging organizational reputation and user trust. Forums often serve as critical communication platforms for customer support, community engagement, or internal collaboration; thus, integrity compromise can disrupt these functions. Attackers could deface forums, inject misleading information, or escalate privileges indirectly by altering forum settings. While confidentiality and availability are not directly impacted, the integrity breach can facilitate further social engineering or phishing attacks targeting European users. Organizations in sectors with high reliance on community forums, such as technology, education, and public services, face increased risk. Additionally, regulatory frameworks like GDPR emphasize data integrity and security, so exploitation could result in compliance issues and legal consequences.

Organizations should immediately monitor for unusual forum activity indicative of unauthorized modifications. Until an official patch is released, restrict access to wpForo administrative endpoints by IP whitelisting or VPN-only access. Implement web application firewalls (WAFs) with custom rules to detect and block anomalous requests targeting forum modification functions. Regularly audit forum user roles and permissions to ensure least privilege principles are enforced. Consider temporarily disabling vulnerable forum features if feasible. Engage with the vendor or security community to obtain patches or workarounds promptly. Conduct security awareness training for forum administrators to recognize signs of compromise. Finally, maintain comprehensive backups of forum data to enable rapid restoration if integrity is compromised.