The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'sirv_save_prevented_sizes' function in all versions up to, and including, 7.2.7. This makes it possible for authenticated attackers, with Contributor-level access and above, to exploit the 'sirv_upload_file_by_chunks_callback' function, which lacks proper file type validation, allowing attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.

Wordfence AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Wordfence CWE-862

Wordfence https://plugins.trac.wordpress.org/browser/sirv/tags/7.2.7/sirv.php#L6331 [No types assigned]

Wordfence https://plugins.trac.wordpress.org/browser/sirv/trunk/sirv.php?rev=3103410#L4647 [No types assigned]

Wordfence https://plugins.trac.wordpress.org/changeset/3115018/ [No types assigned]

Wordfence https://www.wordfence.com/threat-intel/vulnerabilities/id/1e3e628f-b5e7-40fd-9d34-4a3b23e1e0e7?source=cve [No types assigned]