Description
WordPress Plugin Smush Image Compression and Optimization is prone to a directory traversal vulnerability because it fails to sufficiently verify user-supplied input. Exploiting this issue can allow an attacker to obtain sensitive information that could aid in further attacks. WordPress Plugin Smush Image Compression and Optimization version 2.7.5 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 2.7.6 or latest
References
https://packetstormsecurity.com/files/144494/WordPress-Smush-Image-2.7.4.1-Directory-Traversal.html
https://wordpress.org/support/topic/file-transversal-bug/
https://plugins.svn.wordpress.org/wp-smushit/trunk/readme.txt
Related Vulnerabilities
WordPress Plugin Instagram Feed Unspecified Vulnerability (1.10.2)
WordPress Plugin Gravity Forms Unspecified Vulnerability (2.4.17)
WordPress Plugin Welcome Announcement Multiple Cross-Site Scripting Vulnerabilities (1.0.5)
Apache HTTP Server Numeric Errors Vulnerability (CVE-2010-0010)
WordPress 4.3.x Cross-Domain Flash Injection Vulnerability (4.3 - 4.3.14)