CVE-2025-67586 identifies a missing authorization vulnerability in the Ronald Huereca Highlight and Share plugin, versions up to and including 5.2.0. This vulnerability arises due to incorrectly configured access control security levels, allowing remote attackers to bypass authorization checks. The exploit requires no authentication or user interaction, increasing its accessibility to potential attackers. The vulnerability primarily impacts confidentiality, enabling unauthorized access to certain data or functionalities within the plugin, though it does not compromise data integrity or system availability. The CVSS 3.1 base score is 5.3, reflecting a medium severity level, with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and unchanged scope (S:U). No known exploits have been reported in the wild, and no patches have been released at the time of publication. The vulnerability affects organizations using the Highlight and Share plugin, which is typically employed in content management systems to facilitate content highlighting and sharing functionalities. The lack of proper authorization checks could allow attackers to access or manipulate highlight and share features, potentially leaking sensitive information or enabling further attacks. The issue was publicly disclosed on December 9, 2025, by Patchstack, with the vulnerability state marked as published but without an available patch. Organizations should be aware of this vulnerability and monitor vendor communications for updates.

For European organizations, the missing authorization vulnerability in Highlight and Share could lead to unauthorized disclosure of sensitive content or metadata managed by the plugin. While the impact on confidentiality is limited, exposure of internal or proprietary information could have reputational and compliance consequences, especially under GDPR regulations. The vulnerability does not affect data integrity or availability, so operational disruption is unlikely. However, attackers exploiting this flaw could gain footholds for further reconnaissance or lateral movement within affected systems. Organizations in sectors such as media, publishing, education, and any relying heavily on content sharing platforms are at higher risk. The absence of required authentication and user interaction lowers the barrier for exploitation, increasing the likelihood of opportunistic attacks. Given no known exploits currently exist, the immediate risk is moderate but could escalate if weaponized. Failure to address this vulnerability could result in regulatory scrutiny and potential data breach notifications under European data protection laws.

European organizations should immediately audit their use of the Ronald Huereca Highlight and Share plugin to determine if affected versions (up to 5.2.0) are deployed. Until an official patch is released, administrators should restrict access to the plugin’s functionalities by implementing strict access control policies at the web server or application level, such as IP whitelisting or role-based access restrictions. Monitoring web server logs and application activity for unusual access patterns related to the plugin’s endpoints can help detect exploitation attempts. Organizations should also consider disabling or uninstalling the plugin if it is not essential. Maintaining an up-to-date inventory of plugins and their versions will facilitate rapid response once a patch becomes available. Additionally, applying web application firewalls (WAFs) with custom rules to block unauthorized requests targeting the plugin can provide a temporary protective layer. Finally, organizations should stay informed through vendor advisories and security bulletins to promptly apply official fixes.