CVE-2025-11726 is a vulnerability classified under CWE-862 (Missing Authorization) affecting the Beaver Builder Page Builder plugin for WordPress, versions up to 2.9.4. The root cause is insufficient capability checks in REST API endpoints within the 'fl-controls/v1' namespace, which manage global presets such as colors and backgrounds that apply site-wide across all Beaver Builder content. This flaw allows any authenticated user with contributor-level permissions or higher to bypass intended authorization controls and perform unauthorized modifications to these global presets. Since these presets influence the visual appearance of the entire site, unauthorized changes could lead to defacement, brand inconsistency, or user confusion. The vulnerability does not allow for data disclosure or denial of service, focusing primarily on integrity impact. The CVSS v3.1 base score is 4.3 (medium), reflecting network attack vector (remote), low attack complexity, requiring privileges (contributor or above), no user interaction, and limited impact on integrity only. No patches or known exploits are currently published, but the vulnerability is publicly disclosed and should be addressed promptly. The issue highlights the importance of strict authorization checks on REST API endpoints, especially those controlling site-wide settings in popular CMS plugins.

For European organizations, this vulnerability poses a risk to the integrity of their web presence, particularly for those relying on Beaver Builder for site design and branding consistency. Unauthorized changes to global presets could result in visual defacement, misleading user experience, or reputational damage. While it does not directly compromise sensitive data or availability, the ability for lower-privileged authenticated users to alter site-wide appearance could be exploited for social engineering or to undermine trust. Organizations with contributor-level users or multiple content editors are at higher risk. The impact is more pronounced for businesses in sectors where brand image and user trust are critical, such as e-commerce, media, and government websites. Additionally, the vulnerability could be leveraged as part of a broader attack chain if combined with other vulnerabilities or social engineering tactics.

To mitigate this vulnerability, European organizations should: 1) Immediately review and restrict user roles and permissions, ensuring that contributor-level access is granted only to trusted users. 2) Monitor REST API usage logs for unusual activity related to the 'fl-controls/v1' namespace endpoints. 3) Implement Web Application Firewall (WAF) rules to detect and block unauthorized REST API calls targeting global preset controls. 4) Temporarily disable or restrict access to Beaver Builder’s global presets management if feasible until a patch is released. 5) Stay alert for official patches or updates from Beaver Builder and apply them promptly once available. 6) Educate content editors and contributors about the risks of unauthorized changes and enforce strong authentication practices. 7) Consider isolating or sandboxing content editing environments to limit the blast radius of compromised accounts.