Vulnerability details

The TinyPNG – JPEG, PNG & WebP image compression plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the delete_converted_image_size function in all versions up to, and including, 3.6.13. This makes it possible for authenticated attackers, with author-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). An attacker can exploit this by injecting an arbitrary server file path into the 'convert.path' field of the 'tiny_compress_images' post meta on an attachment they own, then triggering attachment deletion to invoke the vulnerable code path.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/eb8a673e-a192-41d4-b53b-7d786887242d?source=cve
• https://plugins.trac.wordpress.org/browser/tiny-compress-images/tags/3.6.13/src/class-tiny-image-size.php#L245
• https://plugins.trac.wordpress.org/browser/tiny-compress-images/tags/3.6.13/src/config/class-tiny-config.php#L12
• https://plugins.trac.wordpress.org/browser/tiny-compress-images/tags/3.6.13/src/class-tiny-image.php#L144
• https://plugins.trac.wordpress.org/browser/tiny-compress-images/tags/3.6.13/src/class-tiny-plugin.php#L859
• https://plugins.trac.wordpress.org/changeset/3532827/tiny-compress-images