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OpenAdvisories
High · 8.0 CVE-2026-48612 EUVD-2026-36380GHSA-575v-33q9-fpgm

Improper state verification in the OAuth implementation could allow an attacker to manipulate the authentication flow and cause a victim’s …

Published Jun 12, 2026 · Updated Jun 12, 2026 · Assigned by hackerone

Description

Improper state verification in the OAuth implementation could allow an attacker to manipulate the authentication flow and cause a victim’s account to be linked to an attacker-controlled account. This can result in unauthorized account linking and potential account takeover.

Affected products

VendorProductAffectedFixed
phpBB phpBB 3.3.0 – ≤ 3.3.16 —

References