YesWiki before 4.6.7 User Enumeration via Lost-Password Flow

{
  "id": "7ac05c43968249dc1c6e9ca1b079cab17beec59a1761de494485b1b988483d5f",
  "url": "https://osv.dev/vulnerability/CVE-2026-104439",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "YesWiki before 4.6.7 User Enumeration via Lost-Password Flow",
    "summary": "YesWiki before 4.6.7 contains a user enumeration vulnerability in LostPasswordAction.php that allows unauthenticated attackers to confirm registered email addresses through differing responses. Attackers can submit emails to the MotDePassePerdu recovery page without rate limiting to identify valid accounts for targeted phishing or password-spraying.",
    "evidence": "osv:CVE-2026-104439",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-104439",
      "aliases": [
        "CVE-2026-104439",
        "GHSA-892r-45m6-45xc"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yeswiki/yeswiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "07120ed8971047f504f7ec78060828f1895f475f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.6.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.6.7"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.6.6",
            "v4.6.5",
            "v4.6.4",
            "v4.6.3",
            "v4.6.2",
            "v4.6.0",
            "v4.5.5",
            "v4.5.4",
            "v4.5.3",
            "v4.5.2",
            "v4.5.1",
            "v4.4.3",
            "v4.4.2",
            "v4.4.1",
            "v4.4.0",
            "v4.3.1",
            "v4.3.0",
            "v4.2.2",
            "v4.2.1",
            "v4.2.0",
            "v4.1.5",
            "v4.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104439.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.126548717Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104439.json",
        "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-892r-45m6-45xc",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-104439",
        "https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-user-enumeration-via-lost-password-flow"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-204"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104439.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-104439",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490497,
  "published_at": "2026-10-02T11:38:15.157+00:00"
}