Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Profile Update Form

{
  "id": "86959bb95dc7e00e8bfd337bd71e5c365ad542992ab7b52142f45ebb78bd2d12",
  "url": "https://osv.dev/vulnerability/CVE-2026-109312",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Profile Update Form",
    "summary": "Grav Login plugin 2.7.0 before 3.9.9 contains an authentication bypass in processUserProfile(), which checks that the session user exists but not that a pending front-end 2FA session is fully authorized. Attackers with a victim's password who can publish a page form without an access rule can invoke update_user before completing 2FA to disable twofa_enabled and take over the account.",
    "evidence": "osv:CVE-2026-109312",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-109312",
      "aliases": [
        "CVE-2026-109312",
        "GHSA-5rph-jqcf-2x36"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/getgrav/grav-plugin-login",
              "type": "GIT",
              "events": [
                {
                  "introduced": "db3a7c90fa511d50ae0a4401c3bf2f9d5668f513"
                },
                {
                  "fixed": "176a175156f271e831703a2b64ca798cc76e221d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.7.0"
                      },
                      {
                        "fixed": "3.9.9"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.9.8",
            "3.9.7",
            "3.9.6",
            "3.9.5",
            "3.9.4",
            "3.9.3",
            "3.9.2",
            "3.9.1",
            "3.9.0",
            "3.8.13",
            "3.8.12",
            "3.8.11",
            "3.8.10",
            "3.8.9",
            "3.8.8",
            "3.8.7",
            "3.8.6",
            "3.8.5",
            "3.8.4",
            "3.8.3",
            "3.8.2",
            "3.8.1",
            "3.8.0",
            "3.7.9",
            "3.7.8.1",
            "3.7.8",
            "3.7.7",
            "3.7.6",
            "3.7.5",
            "3.7.4",
            "3.7.3",
            "3.7.2",
            "3.7.1",
            "3.7.0",
            "3.6.3",
            "3.6.2",
            "3.6.1",
            "3.6.0",
            "3.5.3",
            "3.5.2",
            "3.5.1",
            "3.5.0",
            "3.4.4",
            "3.4.3",
            "3.4.2",
            "3.4.1",
            "3.4.0",
            "3.3.8",
            "3.3.7",
            "3.3.6",
            "3.3.5",
            "3.3.4",
            "3.3.3",
            "3.3.2",
            "3.3.1",
            "3.3.0",
            "3.2.0",
            "3.1.0",
            "3.0.6",
            "3.0.5",
            "3.0.4",
            "3.0.3",
            "3.0.2",
            "3.0.1",
            "3.0.0",
            "2.8.4",
            "2.8.3",
            "2.8.2",
            "2.8.1",
            "2.8.0",
            "2.7.3",
            "2.7.2",
            "2.7.1",
            "2.7.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109312.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.806285365Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109312.json",
        "https://github.com/getgrav/grav/security/advisories/GHSA-5rph-jqcf-2x36",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109312",
        "https://www.vulncheck.com/advisories/grav-login-plugin-2.7.0-before-3.9.9-2fa-bypass-via-profile-update-form",
        "https://github.com/getgrav/grav-plugin-login"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-287"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109312.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109312",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518398,
  "published_at": "2026-10-12T16:05:07.605+00:00"
}