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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
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| francoisjacquet/rosariosis | composer | < 9.0 | 9.0 |
The commit diff shows a critical change from strpos to stripos in URL sanitization logic. The original case-sensitive check failed to remove JavaScript handlers with non-lowercase characters, enabling stored XSS via crafted URLs. This function is directly responsible for neutralizing dangerous patterns in PHP_SELF values used during page generation, making it the root cause of improper input sanitization (CWE-79).
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