CVE-2025-67578 identifies a missing authorization vulnerability in the WP Email Capture plugin developed by Rhys Wynne, affecting all versions up to and including 3.12.4. This vulnerability arises from incorrectly configured access control mechanisms within the plugin, allowing unauthenticated remote attackers to bypass authorization checks. As a result, attackers can access certain plugin features or data that should be restricted, potentially exposing captured email addresses or related information. The vulnerability has a CVSS v3.1 base score of 5.3, indicating a medium severity level. The vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) shows that the attack can be performed remotely over the network without any privileges or user interaction, impacting confidentiality to a limited extent but not integrity or availability. The plugin is commonly used on WordPress sites to capture email addresses for marketing or communication purposes, making the confidentiality of captured data the primary concern. No known exploits have been reported in the wild, and no official patches or mitigation links have been provided at the time of publication. The vulnerability was reserved and published on December 9, 2025, by Patchstack. Given the nature of WordPress plugins and their widespread use, this vulnerability could be leveraged to collect sensitive user data or facilitate further attacks if combined with other vulnerabilities.

For European organizations, the primary impact of CVE-2025-67578 is the potential unauthorized disclosure of captured email addresses and related data, which could lead to privacy violations and non-compliance with GDPR regulations. Exposure of email lists can result in targeted phishing campaigns, reputational damage, and loss of customer trust. Although the vulnerability does not affect data integrity or system availability, the confidentiality breach alone can have significant consequences, especially for organizations relying heavily on email marketing or customer communications. Small and medium enterprises using WP Email Capture without rigorous security controls are particularly at risk. Additionally, organizations may face regulatory fines if personal data is exposed due to inadequate access controls. The lack of authentication and user interaction requirements makes exploitation relatively easy, increasing the risk of automated attacks. However, the absence of known exploits in the wild suggests that immediate widespread exploitation is not confirmed but vigilance is necessary.

European organizations should take proactive steps to mitigate this vulnerability beyond waiting for official patches. First, they should audit all WordPress sites using WP Email Capture to identify affected versions. Until a patch is available, restrict access to the plugin’s administrative and data endpoints using web application firewalls (WAFs) or IP whitelisting to limit exposure. Implement strict role-based access controls within WordPress to minimize the number of users who can interact with the plugin. Monitor web server and application logs for unusual access patterns or attempts to reach plugin-specific URLs. Consider temporarily disabling the plugin if email capture functionality is not critical or can be replaced with a more secure alternative. Once a patch is released, apply it promptly and verify that authorization checks are correctly enforced. Additionally, review and update privacy policies and incident response plans to address potential data exposure scenarios. Educate staff responsible for website management about the risks and signs of exploitation related to this vulnerability.