CVE-2025-64245 identifies a missing authorization vulnerability within the 'Import external attachments' product developed by ryanpcmcquen, affecting all versions up to and including 1.5.12. The core issue stems from incorrectly configured access control security levels, which fail to properly restrict users with limited privileges from importing external attachments. This missing authorization allows an attacker with low-level privileges to perform actions beyond their intended scope, specifically importing external attachments without proper permission checks. The vulnerability does not require user interaction and can be exploited remotely over the network, increasing its attack surface. The CVSS v3.1 base score is 4.3, indicating a medium severity primarily due to the confidentiality impact, as unauthorized import of attachments could expose sensitive data. There is no impact on integrity or availability, and no known exploits have been reported in the wild to date. The vulnerability was reserved in late October 2025 and published in mid-December 2025, but no patches or fixes have been linked yet. The lack of patches means organizations must rely on compensating controls until official updates are available. This vulnerability highlights the importance of proper access control enforcement in software handling external content imports.

For European organizations, the primary impact of CVE-2025-64245 is the potential unauthorized access to sensitive or confidential information through the import of external attachments without proper authorization. This could lead to data leakage or exposure of proprietary or personal data, which is especially critical under GDPR regulations. Although the vulnerability does not affect data integrity or system availability, the confidentiality breach alone can result in regulatory penalties, reputational damage, and loss of customer trust. Organizations in sectors such as finance, healthcare, and government, where sensitive attachments are frequently handled, are at higher risk. The ease of exploitation (network accessible, low privileges required, no user interaction) increases the likelihood of opportunistic attacks. However, the absence of known exploits in the wild and the medium CVSS score suggest the threat is moderate but should not be ignored. European entities using the affected product must assess their exposure and implement mitigations promptly to prevent unauthorized data access.

1. Immediately audit and restrict user privileges related to the 'Import external attachments' functionality, ensuring only fully trusted users have access. 2. Implement network segmentation and firewall rules to limit access to the affected service from untrusted or external networks. 3. Monitor logs and alerts for unusual import activity or access attempts to detect potential exploitation attempts early. 4. Until an official patch is released, consider disabling the import-external-attachments feature if feasible or replacing it with alternative secure methods for handling external attachments. 5. Conduct a thorough review of access control configurations within the application to identify and remediate other potential authorization weaknesses. 6. Prepare for rapid deployment of patches once available by maintaining an up-to-date inventory of affected systems. 7. Educate administrators and users about the risks associated with importing external attachments and enforce strict operational procedures. 8. Employ Data Loss Prevention (DLP) tools to monitor and control sensitive data flows related to attachments.