CVE-2025-63016 is a vulnerability classified under CWE-862 (Missing Authorization) found in the QuadLayers TikTok Feed plugin, a WordPress plugin designed to integrate TikTok content feeds into websites. This vulnerability arises from incorrectly configured access control mechanisms that fail to properly verify whether a user has the necessary permissions to perform certain actions within the plugin. Specifically, the flaw allows unauthenticated attackers to perform actions that should be restricted, potentially modifying plugin settings or content feeds without authorization. The CVSS v3.1 base score is 5.3, indicating a medium severity level. The vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) shows that the attack can be performed remotely over the network with low attack complexity, no privileges or user interaction required, and impacts integrity but not confidentiality or availability. The affected versions include all versions up to 4.6.4, with no patch currently available. No known exploits have been observed in the wild, but the vulnerability's nature makes it a potential target for attackers seeking to manipulate website content or configurations. The plugin’s role in displaying TikTok feeds means that unauthorized changes could lead to misinformation, defacement, or reputational damage for affected sites. The vulnerability was reserved in late October 2025 and published at the end of December 2025, indicating recent discovery and disclosure.

For European organizations, the primary impact of this vulnerability lies in the potential unauthorized modification of website content or plugin configurations, which can undermine data integrity and trustworthiness of published information. Organizations relying on the QuadLayers TikTok Feed plugin to display social media content may face risks such as content tampering, insertion of misleading or malicious feeds, or disruption of intended social media integrations. While confidentiality and availability are not directly affected, integrity violations can lead to reputational damage, loss of user trust, and potential compliance issues under regulations like GDPR if manipulated content results in misinformation or harms users. The ease of exploitation without authentication increases the risk profile, especially for public-facing websites. However, the absence of known exploits in the wild and the medium severity score suggest a moderate but non-critical threat level. Organizations with high web presence and social media integration are more exposed, and attackers might leverage this vulnerability as part of broader campaigns targeting web content manipulation.

To mitigate this vulnerability, European organizations should immediately audit the access control configurations of the QuadLayers TikTok Feed plugin to ensure that all sensitive actions require proper authorization. Until an official patch is released, restrict access to plugin management interfaces to trusted administrators only, possibly by implementing IP whitelisting or multi-factor authentication for backend access. Monitor web server and application logs for unusual activity related to the plugin endpoints, such as unauthorized POST or configuration change attempts. Consider temporarily disabling the plugin if it is not critical to operations or replacing it with alternative, well-maintained plugins that provide similar functionality with better security posture. Stay informed about vendor updates and apply patches promptly once available. Additionally, conduct regular security assessments of WordPress installations and enforce the principle of least privilege for all user roles. Employ web application firewalls (WAF) with custom rules to block suspicious requests targeting the plugin’s endpoints. Finally, educate site administrators about the risks of unauthorized access and the importance of timely updates.