CVE-2018-19420
In GetSimpleCMS 3.3.15, admin/upload.php blocks .html uploads but there are several alternative cases in which HTML can be executed, such as a file with no extension or an unrecognized extension (e.g., the test or test.asdf filename), because of admin/upload-uploadify.php, and validate_safe_file in admin/inc/security_functions.php.
| Software | From | Fixed in |
|---|---|---|
| get-simple / getsimple_cms | 3.3.15 | 3.3.15.x |
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