The vulnerability identified as CVE-2025-10000 affects the Qyrr – simply and modern QR-Code creation plugin for WordPress, specifically versions up to and including 2.0.7. The root cause is the lack of proper file type validation in the blob_to_file() function, which processes file uploads. This weakness falls under CWE-434, indicating an unrestricted file upload vulnerability. Authenticated users with Contributor-level permissions or higher can exploit this flaw to upload arbitrary files to the server hosting the WordPress site. Since the plugin does not validate the file type or restrict dangerous file extensions, attackers can upload malicious scripts or executable files. This can lead to remote code execution (RCE) if the uploaded files are executed by the server, compromising confidentiality and integrity of the system. The vulnerability has a CVSS 3.1 base score of 6.4, reflecting medium severity, with an attack vector of network, low attack complexity, requiring privileges but no user interaction, and a scope change. No patches or fixes are currently linked, and no known exploits have been observed in the wild as of the publication date. The vulnerability affects all versions of the plugin up to 2.0.7, which is used by WordPress sites seeking QR code generation functionality.

The impact of this vulnerability is significant for organizations running WordPress sites with the Qyrr plugin installed. Successful exploitation allows attackers with Contributor-level access to upload arbitrary files, potentially leading to remote code execution. This can result in unauthorized access, data theft, defacement, or full server compromise. The confidentiality and integrity of the affected systems are at risk, although availability impact is minimal. Since Contributor-level access is required, the threat is somewhat mitigated by authentication controls, but insider threats or compromised accounts could be leveraged. The vulnerability could be used as a foothold for lateral movement within the network or to deploy malware. Organizations with high-value web assets or sensitive data hosted on WordPress platforms are particularly at risk. The lack of known exploits currently reduces immediate risk but does not eliminate the threat, especially as exploit code may be developed.

To mitigate this vulnerability, organizations should immediately update the Qyrr plugin to a version that includes proper file type validation once available. Until a patch is released, administrators should restrict Contributor-level user permissions or disable the plugin if feasible. Implementing web application firewalls (WAFs) with rules to detect and block suspicious file uploads can provide temporary protection. Monitoring file upload directories for unusual or executable files and setting strict file system permissions to prevent execution of uploaded files can reduce risk. Additionally, enforcing strong authentication and monitoring user activity for anomalous behavior will help detect potential exploitation attempts. Regular backups and incident response plans should be in place to recover from any compromise. Developers maintaining the plugin should add robust server-side validation to restrict allowed file types and sanitize file names to prevent directory traversal or code injection.