CVE-2025-64272 is a vulnerability identified in the GetResponse Email marketing plugin for WordPress, specifically affecting versions up to and including 1.5.3. The vulnerability allows an attacker who has low-level privileges (PR:L) to remotely retrieve embedded sensitive system information without requiring user interaction (UI:N). The attack vector is network-based (AV:N), meaning exploitation can occur remotely over the internet. The vulnerability does not impact the integrity or availability of the system but has a high impact on confidentiality (C:H). This means that sensitive data embedded within the plugin or its configuration can be exposed to unauthorized actors within the control sphere of the system. The vulnerability arises from improper access controls or insufficient sanitization of sensitive data retrieval functions within the plugin. Although no known exploits are currently reported in the wild, the medium CVSS score of 6.5 reflects the significant risk posed by unauthorized information disclosure, which could facilitate further targeted attacks or data breaches. The plugin is widely used for email marketing integration in WordPress sites, making it a valuable target for attackers seeking to gather intelligence on system configurations or user data. The vulnerability was reserved in late October 2025 and published in December 2025, indicating recent discovery and disclosure. No official patches or updates are currently linked, so users must rely on interim mitigations until a fix is released.

For European organizations, this vulnerability poses a risk primarily to confidentiality, as sensitive system information could be exposed to unauthorized parties. This could include configuration details, API keys, or other embedded data that attackers might leverage to escalate privileges or conduct further attacks such as phishing or targeted intrusions. Organizations heavily reliant on WordPress for their digital presence and using the GetResponse plugin for email marketing are at increased risk. The exposure of sensitive data could lead to reputational damage, regulatory non-compliance (e.g., GDPR violations due to data leakage), and potential financial losses. Since the vulnerability requires some level of authentication but no user interaction, insider threats or compromised low-privilege accounts could exploit this flaw remotely. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure. European companies with extensive marketing operations or handling sensitive customer data should consider this vulnerability a priority for risk management.

1. Immediately audit and restrict access to the GetResponse Email marketing plugin within WordPress, limiting it to trusted administrators only. 2. Monitor logs and network traffic for unusual access patterns or attempts to retrieve sensitive data from the plugin endpoints. 3. Disable or uninstall the plugin temporarily if it is not critical to operations until an official patch is released. 4. Implement strict role-based access controls (RBAC) within WordPress to minimize the number of users with privileges sufficient to exploit this vulnerability. 5. Use web application firewalls (WAFs) to detect and block suspicious requests targeting the plugin’s known endpoints. 6. Stay informed about updates from GetResponse and apply security patches promptly once available. 7. Conduct internal security awareness training to reduce the risk of credential compromise that could facilitate exploitation. 8. Consider isolating marketing-related WordPress instances from critical internal networks to contain potential breaches.