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 Plugin WP Photo Album 'id' Parameter Cross-Site Scripting (1.5.1)
IBM RTC Improper Restriction of XML External Entity Reference Vulnerability (CVE-2016-0219)
Jenkins Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2014-3680)
PHP Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2006-4812)