CVE-2026-33661
HighSummary
W wersjach przed 3.7.20 w funkcji `verify_wechat_sign()` w pliku `src/Functions.php` pomijana jest weryfikacja podpisu, gdy host zgłasza `localhost`. Atakujący może wykorzystać to, wysyłając spreparowane żądanie HTTP do punktu końcowego WeChat Pay z nagłówkiem `Host: localhost`, co pozwala na fałszowanie powiadomień o sukcesie płatności.
Risk Assessment
Możliwość fałszowania powiadomień o płatności może prowadzić do oznaczania zamówień jako opłaconych bez rzeczywistej płatności, co stwarza poważne ryzyko finansowe dla organizacji.
Recommendation
Zaleca się aktualizację do wersji 3.7.20 lub nowszej, aby zabezpieczyć aplikację przed tym rodzajem ataku.
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Original NVD description (English source)
Pay is an open-source payment SDK extension package for various Chinese payment services. Prior to version 3.7.20, the `verify_wechat_sign()` function in `src/Functions.php` unconditionally skips all signature verification when the PSR-7 request reports `localhost` as the host. An attacker can exploit this by sending a crafted HTTP request to the WeChat Pay callback endpoint with a `Host: localhost` header, bypassing the RSA signature check entirely. This allows forging fake WeChat Pay payment success notifications, potentially causing applications to mark orders as paid without actual payment. Version 3.7.20 fixes the issue.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

