CVE-2025-62944 identifies a critical missing authorization vulnerability in the MSTW CSV EXPORTER plugin developed by Mark O'Donnell, affecting all versions up to and including 1.4. This vulnerability arises from incorrectly configured access control security levels, allowing unauthenticated remote attackers to bypass authorization mechanisms entirely. The plugin, typically used within WordPress environments to export CSV data, fails to verify whether a requester has the necessary permissions before processing export requests. As a result, attackers can remotely invoke export functionality without any authentication or user interaction, leading to unauthorized data access, modification, or deletion. The CVSS 3.1 base score of 9.8 reflects the vulnerability's critical nature, with attack vector being network-based (AV:N), no privileges required (PR:N), no user interaction (UI:N), and full impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits have been reported yet, the simplicity of exploitation and the severity of impact make this a high-risk issue. The vulnerability affects WordPress sites using MSTW CSV EXPORTER, which may be used by organizations for data export tasks, potentially exposing sensitive information or enabling destructive actions. The lack of patch links suggests that a fix is not yet publicly available, emphasizing the need for immediate mitigation steps. The vulnerability was reserved and published in late October 2025, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a significant threat to data confidentiality, integrity, and availability. Organizations relying on MSTW CSV EXPORTER for exporting sensitive or regulated data risk unauthorized data leakage, which could lead to compliance violations under GDPR and other data protection laws. The ability for unauthenticated attackers to execute export operations could also facilitate lateral movement within networks or data manipulation, undermining trust in business processes. Availability impacts could disrupt business continuity if attackers exploit the vulnerability to delete or corrupt data exports. Given the critical CVSS score and network-level exploitability, the threat extends to any exposed WordPress installations using the affected plugin, including government, healthcare, finance, and critical infrastructure sectors across Europe. The lack of known exploits currently provides a window for proactive defense, but the high severity demands urgent attention to prevent potential breaches.

Immediate mitigation should focus on restricting access to the MSTW CSV EXPORTER plugin endpoints at the network and application layers. Organizations should implement web application firewall (WAF) rules to block unauthorized requests targeting the export functionality. Until an official patch is released, disabling or uninstalling the MSTW CSV EXPORTER plugin is recommended if feasible. If the plugin is essential, restrict access to trusted IP addresses or require authentication via reverse proxies or additional access control mechanisms. Regularly monitor logs for unusual export requests or spikes in data export activity. Conduct thorough access control audits on all WordPress plugins and ensure the principle of least privilege is enforced. Engage with the vendor or community for patch updates and apply them promptly once available. Additionally, implement network segmentation to limit exposure of WordPress servers and maintain up-to-date backups to recover from potential data integrity attacks.