Description
An issue was discovered in the Ultimate Member plugin 2.39 for WordPress. It allows unauthorized profile and cover picture modification. It is possible to modify the profile and cover picture of any user once one is connected. One can also modify the profiles and cover pictures of privileged users. To perform such a modification, one first needs to (for example) intercept an upload-picture request and modify the user_id parameter.
Remediation
References
Related Vulnerabilities
WordPress 4.3.x Cross-Domain Flash Injection Vulnerability (4.3 - 4.3.14)
Moodle Permissions, Privileges, and Access Controls Vulnerability (CVE-2014-0125)
WordPress Plugin WP SVG Icons Multiple Unspecified Vulnerabilities (3.1.8.1)
WordPress Plugin Easy Registration Forms Cross-Site Scripting (1.8.3)
WordPress Plugin Simple Ads Manager Arbitrary File Upload (2.5.94)