CVE-2025-59591 is a security vulnerability classified under CWE-862 (Missing Authorization) affecting the wpDiscuz plugin developed by AdvancedCoding. wpDiscuz is a popular WordPress plugin used to enhance comment functionality on websites. The vulnerability arises due to improperly configured access control mechanisms, allowing users with limited privileges (requiring at least low-level privileges, as indicated by PR:L) to perform actions or access resources beyond their authorization scope. The CVSS 3.1 base score is 4.3 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), and unchanged scope (S:U). The impact primarily affects integrity (I:L) without affecting confidentiality or availability. This means an attacker with some level of authenticated access could manipulate or alter data or settings within the wpDiscuz plugin environment without proper authorization checks. The affected versions include all versions up to 7.6.33, with no specific lower bound version stated. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was published on September 22, 2025, and reserved on September 17, 2025. Given the nature of the vulnerability, it could allow privilege escalation or unauthorized modification of comment-related data or configurations, potentially undermining the integrity of user-generated content or site moderation processes.

For European organizations, especially those relying on WordPress websites with the wpDiscuz plugin installed, this vulnerability poses a risk to the integrity of their web content and user interactions. Compromised integrity could lead to unauthorized changes in comments, potentially enabling misinformation, defacement, or manipulation of user feedback and discussions. This can damage brand reputation, reduce user trust, and potentially violate data protection regulations if manipulated content leads to misinformation or user harm. Although confidentiality and availability are not directly impacted, the integrity breach could be leveraged as a foothold for further attacks or social engineering campaigns. Organizations in sectors such as media, e-commerce, education, and public services that use WordPress extensively are particularly at risk. The absence of known exploits reduces immediate risk, but the medium severity and ease of exploitation (low complexity, network accessible) warrant proactive mitigation.

1. Immediate review and restriction of user privileges within WordPress to ensure minimal necessary access, especially for roles interacting with wpDiscuz. 2. Monitor and audit wpDiscuz plugin activity logs for unauthorized or unusual changes in comment data or plugin settings. 3. Apply principle of least privilege to all users and roles, removing any unnecessary permissions that could be exploited. 4. Stay alert for official patches or updates from AdvancedCoding and apply them promptly once available. 5. Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting wpDiscuz endpoints. 6. Conduct regular security assessments and penetration tests focusing on WordPress plugins and access control mechanisms. 7. Educate site administrators about the risks of privilege escalation and the importance of secure plugin management. 8. Consider temporary disabling or replacing wpDiscuz if critical until a patch is released, especially on high-value or sensitive websites.