{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48611", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-05-22T15:00:09.276Z", "datePublished": "2026-06-12T02:27:43.351Z", "dateUpdated": "2026-06-12T02:27:43.351Z"}, "containers": {"cna": {"descriptions": [{"lang": "en", "value": "Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations."}], "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:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-287", "description": "CWE-287 Improper Authentication - Generic"}]}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-06-12T02:27:43.351Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations."}], "id": "CVE-2026-48611", "lastModified": "2026-06-12T04:17:08.180", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "support@hackerone.com", "type": "Secondary"}]}, "published": "2026-06-12T04:17:08.180", "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-287"}], "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": "2026-06-12T04:30:04.781867+00:00", "title": "Improper Authentication in phpBB OAuth Enables Account Hijacking", "updated": "2026-06-12T04:45:05.222512+00:00", "vendors": ["phpbb", "phpbb$PRODUCT$phpbb"]}