CVE-2025-6786 is a medium-severity vulnerability affecting the DocCheck Login plugin for WordPress, developed by antwerpes. The vulnerability arises from improper access control (CWE-284) in all versions up to and including 1.1.5 of the plugin. Specifically, the plugin redirects users to a login page only after the content of password-protected posts has already been loaded. This flawed logic allows unauthenticated attackers to access and read posts that should be restricted, bypassing intended access controls. The vulnerability does not require any user interaction or privileges, and it can be exploited remotely over the network. The CVSS 3.1 base score is 5.3, reflecting a medium severity with low complexity of attack and no authentication required. The impact is limited to confidentiality, as the vulnerability allows unauthorized disclosure of protected content, but does not affect integrity or availability. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability was published on July 4, 2025, with the issue reserved on June 27, 2025. The root cause is the plugin’s failure to enforce access control before rendering protected content, which is a common security design flaw in web applications handling sensitive or restricted data.

For European organizations using WordPress sites with the DocCheck Login plugin, this vulnerability poses a risk of unauthorized disclosure of sensitive or confidential information contained in password-protected posts. This could include internal communications, proprietary data, or regulated personal information, depending on the site’s use case. The breach of confidentiality could lead to reputational damage, regulatory non-compliance (especially under GDPR if personal data is exposed), and potential legal liabilities. Since the vulnerability does not affect integrity or availability, operational disruption is unlikely. However, the ease of exploitation without authentication means attackers could systematically scrape protected content, increasing the risk of data leakage. Organizations in healthcare, pharmaceuticals, or other sectors that rely on DocCheck Login for secure content delivery should be particularly cautious. The lack of known exploits in the wild suggests this is a newly disclosed vulnerability, but proactive mitigation is critical to prevent future exploitation.

1. Immediately audit all WordPress sites using the DocCheck Login plugin to identify affected versions (up to 1.1.5). 2. Disable the plugin temporarily if possible until a patch or update is released by the vendor. 3. Monitor the vendor’s official channels for security updates or patches addressing CVE-2025-6786 and apply them promptly once available. 4. Implement additional access control mechanisms at the web server or application firewall level to restrict access to sensitive posts, such as IP whitelisting or authentication gateways. 5. Review and limit the exposure of sensitive content on WordPress sites, ensuring that critical information is not solely protected by this plugin. 6. Conduct penetration testing focused on access control bypasses to verify no other similar vulnerabilities exist. 7. Educate site administrators about the risks of improper access control and encourage regular plugin updates and security reviews. 8. Consider alternative secure authentication plugins with verified access control mechanisms if immediate patching is not feasible.