CVE-2026-5217
HighSummary
Wtyczka Optimole – Optymalizacja obrazów dla WordPressa jest podatna na przechowywane ataki Cross-Site Scripting (XSS) we wszystkich wersjach do 4.2.2 włącznie. Problem wynika z niewystarczającej sanitizacji danych wejściowych i ucieczki danych wyjściowych w parametrze 's' (opis srcset) w nieautoryzowanym punkcie końcowym REST.
Risk Assessment
Atakujący bez autoryzacji mogą wstrzykiwać dowolne skrypty webowe, co może prowadzić do kradzieży danych użytkowników lub przejęcia kontroli nad stroną. To stwarza poważne zagrożenie dla bezpieczeństwa witryny oraz jej użytkowników.
Recommendation
Zaleca się aktualizację wtyczki do najnowszej wersji, aby usunąć tę podatność. Dodatkowo, warto przeprowadzić audyt bezpieczeństwa, aby zidentyfikować i usunąć potencjalne zagrożenia związane z wstrzykniętymi skryptami.
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Original NVD description (English source)
The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 4.2.2. This is due to insufficient input sanitization and output escaping on the user-supplied 's' parameter (srcset descriptor) in the unauthenticated /wp-json/optimole/v1/optimizations REST endpoint. The endpoint validates requests using an HMAC signature and timestamp, but these values are exposed directly in the frontend HTML making them accessible to any visitor. The plugin uses sanitize_text_field() on the descriptor value of rest.php, which strips HTML tags but does not escape double quotes. The poisoned descriptor is then stored via transients (backed by the WordPress options table) and later retrieved and injected verbatim into the srcset attribute of tag_replacer.php without proper escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts into pag
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

