{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48612", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-05-22T15:00:09.276Z", "datePublished": "2026-06-12T02:27:43.506Z", "dateUpdated": "2026-06-12T02:27:43.506Z"}, "containers": {"cna": {"descriptions": [{"lang": "en", "value": "Improper state verification in the OAuth implementation could allow an attacker to manipulate the authentication flow and cause a victim\u2019s account to be linked to an attacker-controlled account. This can result in unauthorized account linking and potential account takeover."}], "affected": [{"defaultStatus": "unaffected", "vendor": "phpBB", "product": "phpBB", "versions": [{"version": "3.3.0", "status": "affected", "lessThanOrEqual": "3.3.16", "versionType": "semver"}]}], "references": [{"url": "https://www.phpbb.com/community/viewtopic.php?t=2672170"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H", "baseScore": 8, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-352", "description": "CWE-352 Cross-Site Request Forgery (CSRF)"}]}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-06-12T02:27:43.506Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper state verification in the OAuth implementation could allow an attacker to manipulate the authentication flow and cause a victim\u2019s account to be linked to an attacker-controlled account. This can result in unauthorized account linking and potential account takeover."}], "id": "CVE-2026-48612", "lastModified": "2026-06-12T04:17:10.123", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.3, "impactScore": 6.0, "source": "support@hackerone.com", "type": "Secondary"}]}, "published": "2026-06-12T04:17:10.123", "references": [{"source": "support@hackerone.com", "url": "https://www.phpbb.com/community/viewtopic.php?t=2672170"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-352"}], "source": "support@hackerone.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.3.0,3.3.16]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "phpBB", "source": "cna", "vendor": "phpBB"}, "product": "phpbb", "vendor": "phpbb"}], "created": "2026-06-12T04:30:04.781232+00:00", "title": "Improper OAuth State Verification Allows Account Takeover", "updated": "2026-06-12T04:45:05.221979+00:00", "vendors": ["phpbb", "phpbb$PRODUCT$phpbb"]}