CVE-2026-25728
HighSummary
W ClipBucket v5, przed wersją 5.5.3 - #40, występuje podatność typu Time-of-Check to Time-of-Use (TOCTOU) w funkcjonalności przesyłania awatarów i obrazów tła. Aplikacja przenosi przesłane pliki do lokalizacji dostępnej przez sieć przed ich walidacją, co stwarza możliwość wykonania dowolnego kodu PHP przez atakującego przed usunięciem pliku.
Risk Assessment
Podatność ta może prowadzić do zdalnego wykonania kodu, co stwarza poważne zagrożenie dla bezpieczeństwa systemu oraz danych użytkowników. Atakujący może wykorzystać tę lukę do przejęcia kontroli nad aplikacją.
Recommendation
Zaleca się aktualizację ClipBucket do wersji 5.5.3 - #40, aby usunąć tę podatność. Dodatkowo, warto przeprowadzić audyt bezpieczeństwa aplikacji w celu zidentyfikowania innych potencjalnych luk.
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Original NVD description (English source)
ClipBucket v5 is an open source video sharing platform. Prior to 5.5.3 - #40, a Time-of-Check to Time-of-Use (TOCTOU) race condition vulnerability exists in ClipBucket's avatar and background image upload functionality. The application moves uploaded files to a web-accessible location before validating them, creating a window where an attacker can execute arbitrary PHP code before the file is deleted. The uploaded file was moved to a web-accessible path via move_uploaded_file(), then validated via ValidateImage(). If validation failed, the file was deleted via @unlink(). This vulnerability is fixed in 5.5.3 - #40.