critical9.1
CVE-2026-25923
my little forum is a PHP and MySQL based internet forum that displays the messages in classical threaded view.
Impact
my little forum is a PHP and MySQL based internet forum that displays the messages in classical threaded view. Prior to 20260208.1, the application fails to filter the phar:// protocol in URL validation, allowing attackers to upload a malicious Phar Polyglot file (disguised as JPEG) via the image upload feature, trigger Phar deserialization through BBCode [img] tag processing, and exploit Smarty 4.1.0 POP chain to achieve arbitrary file deletion. This vulnerability is fixed in 20260208.1.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mylittleforum | My Little Forum | before 20260208.1 |