CVE-2026-5617
HighSummary
Wtyczka Login as User dla WordPressa jest podatna na eskalację uprawnień we wszystkich wersjach do i włącznie z 1.0.3. Problem wynika z funkcji handle_return_to_admin(), która ufa ciasteczku kontrolowanemu przez klienta (oclaup_original_admin) w celu określenia, którego użytkownika uwierzytelnić, bez weryfikacji po stronie serwera.
Risk Assessment
Zagrożenie polega na tym, że uwierzytelnieni atakujący z dostępem na poziomie Subskrybenta i wyżej mogą zwiększyć swoje uprawnienia do administratora, co stwarza poważne ryzyko dla bezpieczeństwa systemu.
Recommendation
Zaleca się aktualizację wtyczki do najnowszej wersji, aby usunąć tę podatność oraz wdrożenie dodatkowych mechanizmów weryfikacji ciasteczek po stronie serwera.
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Original NVD description (English source)
The Login as User plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.0.3. This is due to the handle_return_to_admin() function trusting a client-controlled cookie (oclaup_original_admin) to determine which user to authenticate as, without any server-side verification that the cookie value was legitimately set during an admin-initiated user switch. This makes it possible for authenticated attackers, with Subscriber-level access and above, to escalate their privileges to administrator by setting the oclaup_original_admin cookie to an administrator's user ID and triggering the "Return to Admin" functionality.