CVE-2025-10749 identifies a missing authorization vulnerability (CWE-862) in the Microsoft Azure Storage for WordPress plugin, versions up to and including 4.5.1. The vulnerability stems from the lack of capability checks on the 'azure-storage-media-replace' AJAX action, which is responsible for handling media replacement operations in the WordPress Media Library integrated with Azure Storage. The plugin exposes a nonce token to all authenticated users, including those with subscriber-level privileges, which should normally have limited capabilities. An attacker with subscriber or higher access can exploit this flaw by sending a crafted AJAX request with the replace_attachment parameter to delete arbitrary media files without proper authorization. This results in unauthorized modification of media content, impacting the integrity and availability of stored media assets. The vulnerability does not affect confidentiality as no sensitive data disclosure is involved. The CVSS 3.1 score of 5.4 reflects a medium severity, with network attack vector, low attack complexity, privileges required, no user interaction, and unchanged scope. No patches are currently linked, and no known exploits have been reported in the wild, but the risk remains significant for affected installations. The vulnerability is particularly relevant for organizations using WordPress sites integrated with Azure Storage via this plugin, as media content could be maliciously deleted, causing operational disruption and potential reputational damage.

For European organizations, this vulnerability poses a risk primarily to the integrity and availability of digital media assets hosted on WordPress sites using the Microsoft Azure Storage plugin. Unauthorized deletion of media files can disrupt website content, marketing materials, and user experience, potentially leading to loss of customer trust and operational downtime. Organizations relying on WordPress for e-commerce, publishing, or corporate communications may face business continuity challenges. Since the exploit requires only subscriber-level access, attackers could leverage compromised or insider accounts to cause damage. The impact is heightened for entities with large media libraries or those that do not have robust backup and recovery processes. While no direct data breach is involved, the loss of media content can indirectly affect confidentiality if media is part of sensitive communications. The vulnerability also increases the attack surface for further exploitation by degrading site integrity. European organizations with compliance obligations around data integrity and availability, such as those under GDPR, may face regulatory scrutiny if media deletion leads to service disruption or data loss.

1. Monitor official 10up and WordPress plugin repositories for patches addressing CVE-2025-10749 and apply updates promptly once available. 2. Until a patch is released, restrict subscriber-level user capabilities by reviewing and hardening WordPress role permissions to limit access to media management features. 3. Implement Web Application Firewall (WAF) rules to detect and block suspicious AJAX requests targeting the 'azure-storage-media-replace' action, especially those containing the replace_attachment parameter. 4. Conduct regular audits of user accounts and remove or downgrade unnecessary subscriber-level accounts to reduce the attack surface. 5. Enable detailed logging of media deletion events and AJAX actions to facilitate early detection of exploitation attempts. 6. Maintain frequent backups of media libraries and test restoration procedures to minimize impact from unauthorized deletions. 7. Educate site administrators and content managers about the vulnerability and encourage vigilance regarding unusual media deletions or user activity. 8. Consider isolating or segmenting WordPress instances integrated with Azure Storage to limit lateral movement if exploitation occurs.