CVE-2026-48612_CVE-2026-48612

8 / 10

HIGH

CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

Basic Information

ID CVE-2026-48612

Source hackerone

Published Jun 12, 2026 at 02:27

Affected Product

Vendor phpBB

Product phpBB

Version 3.3.0

Affected Versions phpBB phpBB 3.3.0

CWE Classification

CWE-352

References

www.phpbb.com /community/viewtopic.php

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-06-12T02:27:43.506Z",
    "modified": "2026-06-12T02:27:43.506Z",
    "type": "cve",
    "title": "CVE-2026-48612",
    "source": "hackerone",
    "references": "https://www.phpbb.com/community/viewtopic.php?t=2672170",
    "id": "CVE-2026-48612",
    "bulletinFamily": "",
    "cwe": [
        "CWE-352"
    ],
    "cvelist": null,
    "sourceData": "phpBB phpBB 3.3.0",
    "sourceHref": "",
    "cvss": {
        "score": 8,
        "severity": "HIGH",
        "vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H",
        "version": "3.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "phpBB",
    "version": "3.3.0",
    "vendor": "phpBB",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}