CVE-2025-39511 is a medium-severity vulnerability classified under CWE-862 (Missing Authorization) affecting the ValvePress Pinterest Automatic Pin plugin, up to version 4.18.2. This vulnerability arises from improperly configured access control mechanisms, allowing users with limited privileges (requiring low privileges but no user interaction) to perform unauthorized actions that should be restricted. Specifically, the flaw enables exploitation of incorrect access control security levels, potentially permitting an attacker with some level of authenticated access to escalate their privileges or manipulate the plugin’s functionality beyond intended permissions. The vulnerability does not impact confidentiality or availability but compromises the integrity of the system by allowing unauthorized modifications or actions within the Pinterest Automatic Pin plugin. The CVSS 3.1 base score is 4.3, indicating a medium severity level, 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). No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was published on May 16, 2025, and has been enriched by CISA, indicating recognition by authoritative cybersecurity entities. The affected product is a WordPress plugin used to automate Pinterest pinning, which is commonly employed by websites to enhance social media marketing and engagement.

For European organizations, the impact of this vulnerability primarily concerns the integrity of their web presence and social media automation workflows. Organizations relying on the ValvePress Pinterest Automatic Pin plugin to manage Pinterest content automatically could face unauthorized modifications to their pinning activities, potentially leading to reputational damage, misinformation, or manipulation of marketing campaigns. While the vulnerability does not directly compromise sensitive data confidentiality or system availability, unauthorized changes could disrupt marketing strategies and user trust. This is particularly relevant for European companies with significant digital marketing operations, e-commerce platforms, or media agencies that integrate Pinterest automation into their workflows. Additionally, given the GDPR environment, any unauthorized manipulation that indirectly leads to data misuse or misrepresentation could have regulatory implications. The lack of known exploits reduces immediate risk, but the presence of a missing authorization flaw means that attackers with some level of access could exploit this vulnerability to escalate privileges or perform unauthorized actions, increasing risk over time if unpatched.

European organizations should take proactive steps to mitigate this vulnerability beyond generic advice. First, they should audit all installations of the ValvePress Pinterest Automatic Pin plugin to identify affected versions (up to 4.18.2) and monitor for updates or patches from ValvePress. Until a patch is available, organizations should consider disabling the plugin or restricting its use to trusted administrators only. Implementing strict role-based access controls (RBAC) within WordPress to limit plugin access to only necessary users can reduce exploitation risk. Additionally, organizations should monitor logs for unusual activity related to Pinterest automation functions and conduct regular security assessments focusing on access control configurations. Employing web application firewalls (WAF) with custom rules to detect and block unauthorized API calls or plugin actions may provide a temporary protective layer. Finally, organizations should maintain an incident response plan that includes steps to address unauthorized changes in social media automation tools and ensure communication channels are ready to mitigate reputational damage if exploitation occurs.