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.
History

Fri, 12 Jun 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 12 Jun 2026 05:00:00 +0000

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First Time appeared Phpbb
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Vendors & Products Phpbb
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Fri, 12 Jun 2026 04:45:00 +0000

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Title Improper OAuth State Verification Allows Account Takeover

Fri, 12 Jun 2026 03:30:00 +0000

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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.
Weaknesses CWE-352
References
Metrics cvssV3_0

{'score': 8, 'vector': 'CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published: 2026-06-12T02:27:43.506Z

Updated: 2026-06-12T14:35:26.012Z

Reserved: 2026-05-22T15:00:09.276Z

Link: CVE-2026-48612

cve-icon Vulnrichment

Updated: 2026-06-12T14:35:20.441Z

cve-icon NVD

Status : Deferred

Published: 2026-06-12T04:17:10.123

Modified: 2026-06-12T16:15:57.387

Link: CVE-2026-48612

cve-icon Redhat

No data.