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The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", this can bypass extension control implemented in the plugin. Moreover, there is a race condition in the zip extraction process which makes the shell file live long enough on the filesystem to be callable by an attacker.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Tatsu Plugin | — | Update tatsu plugin to version 3.3.13, or a newer patched version | May 15, 2025 | Mar 28, 2022 |
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