CVE-2025-67586 identifies a missing authorization vulnerability in the Ronald Huereca Highlight and Share plugin, a tool used to facilitate content highlighting and sharing functionalities. The vulnerability arises from incorrectly configured access control security levels, which means that certain operations or data exposures intended to be restricted to authorized users can be accessed or manipulated by unauthorized actors. The affected versions include all versions up to and including 5.2.0. The lack of a CVSS score indicates that the vulnerability is newly published, and no formal severity assessment has been completed. The technical details specify that this is an access control issue rather than a code execution or injection flaw, implying that the attacker may not need to exploit complex technical weaknesses but rather bypass insufficient authorization checks. No known exploits have been reported in the wild, suggesting that active exploitation is not yet observed, but the risk remains significant due to the nature of the vulnerability. The vulnerability could allow unauthorized users to perform actions or access data that should be restricted, potentially leading to data leakage, unauthorized content manipulation, or privilege escalation within the context of the plugin's functionality. Since the plugin is likely used in content management or collaboration environments, the impact could extend to the confidentiality and integrity of shared information. The absence of patches at the time of publication means organizations must proactively review and harden access controls and monitor for suspicious activity. The vulnerability was assigned by Patchstack, a known security entity focusing on WordPress plugin vulnerabilities, indicating that the plugin is likely used in WordPress environments.

For European organizations, the missing authorization vulnerability in Highlight and Share could lead to unauthorized access to sensitive content or manipulation of shared data within websites or intranet platforms using this plugin. This could compromise confidentiality by exposing private or proprietary information and integrity by allowing unauthorized content changes. The availability impact is likely limited but could occur if unauthorized actions disrupt normal plugin operations. Organizations in sectors such as media, education, government, and enterprises relying on collaborative content sharing are particularly at risk. The lack of authentication requirements for exploitation increases the threat level, as attackers do not need valid credentials to abuse the vulnerability. This could facilitate insider threats or external attackers gaining footholds in web environments. Additionally, the vulnerability could be leveraged as a stepping stone for further attacks, such as privilege escalation or lateral movement within a compromised network. The absence of known exploits currently provides a window for mitigation before widespread abuse. However, the potential impact on data confidentiality and integrity, combined with the ease of exploitation, makes this a significant concern for European organizations using the affected plugin.

Organizations should immediately audit the access control configurations of the Highlight and Share plugin to ensure that all sensitive functionalities are properly restricted to authorized users only. Until an official patch is released, consider disabling or limiting the plugin's use in critical environments. Implement strict role-based access controls (RBAC) and verify that user permissions align with the principle of least privilege. Monitor web server and application logs for unusual access patterns or unauthorized attempts to use the plugin's features. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting the plugin's endpoints. Engage with the vendor or security community to obtain updates or patches as soon as they become available. Conduct regular security assessments and penetration testing focused on access control mechanisms within web applications. Educate administrators and developers about secure configuration practices to prevent similar issues in other plugins or custom code. Finally, maintain an incident response plan to quickly address any exploitation attempts.