CVE-2025-67580 identifies a missing authorization vulnerability in the Constant Contact + WooCommerce plugin, versions up to and including 2.4.1. This flaw arises from incorrectly configured access control security levels, allowing unauthenticated remote attackers to access certain plugin functionality or data that should be restricted. The vulnerability is exploitable over the network without requiring any privileges or user interaction, making it accessible to a wide range of attackers. The CVSS v3.1 score is 5.3 (medium), reflecting a low complexity attack vector (network), no privileges required, and no user interaction needed. The impact is limited to confidentiality loss, with no direct impact on integrity or availability. The vulnerability could allow attackers to retrieve sensitive marketing or customer data managed via the Constant Contact integration, potentially leading to privacy violations or information leakage. 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 issue affects organizations using WooCommerce with the Constant Contact plugin, commonly employed in e-commerce environments to synchronize customer and marketing data. The root cause is a failure to enforce proper authorization checks on certain plugin endpoints or API calls, allowing unauthorized access. This vulnerability highlights the importance of rigorous access control validation in third-party plugins that integrate with customer data platforms.

For European organizations, the primary impact of CVE-2025-67580 is the potential unauthorized disclosure of customer or marketing data managed through the Constant Contact + WooCommerce integration. This can lead to privacy breaches, non-compliance with GDPR regulations, and reputational damage. While the vulnerability does not allow data modification or service disruption, the confidentiality loss alone can have serious consequences, especially for businesses handling sensitive customer information. E-commerce companies relying on WooCommerce and Constant Contact for email marketing and customer engagement are particularly at risk. The exposure of customer data could facilitate further targeted attacks such as phishing or social engineering. Additionally, regulatory fines under GDPR for data breaches could be significant. The lack of known exploits currently reduces immediate risk, but the ease of exploitation and network accessibility mean attackers could develop exploits rapidly once the vulnerability is public. Organizations in Europe with high volumes of online retail transactions and integrated marketing platforms should prioritize addressing this vulnerability to avoid data leakage and compliance issues.

1. Monitor Constant Contact and WooCommerce vendor channels closely for official patches addressing CVE-2025-67580 and apply them promptly upon release. 2. Until patches are available, restrict access to the affected plugin endpoints by implementing network-level controls such as IP whitelisting or web application firewall (WAF) rules to block unauthorized requests. 3. Conduct thorough access control reviews on the WooCommerce and Constant Contact integration to identify and remediate any other potential authorization weaknesses. 4. Enable detailed logging and monitoring of plugin-related API calls and user activity to detect unusual or unauthorized access attempts. 5. Educate internal teams about the vulnerability and encourage vigilance for suspicious behavior that might indicate exploitation attempts. 6. Consider temporarily disabling the Constant Contact + WooCommerce integration if feasible, especially in high-risk environments, until a secure patch is available. 7. Review and enhance overall plugin security posture by limiting plugin permissions and ensuring minimal necessary access is granted. 8. Perform regular security assessments and penetration testing focused on third-party plugin integrations to proactively identify similar issues.