Shortcodes Ultimate <= 5.12.6 - Authenticated (Subscriber+) Arbitrary File Read via Shortcode

The Shortcodes Ultimate plugin for WordPress is vulnerable to Arbitrary File Read in versions up to, and including, 5.12.6. This is due to insufficient validation on the url being supplied via the "url" attribute of the su_table shortcode. This makes it possible for authenticated attackers, with subscriber-level privileges and above, to supply paths to arbitrary files that will be returned when rendering the shortcode. This can be leveraged to read sensitive configuration files like wp-config.php. This is only exploitable when the Unsafe features option is enabled.

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Shortcodes Ultimate 5.12.7 closes this, and updating the plugin is the step that ends it.

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