admin3 through 3.0.0 Weak Password Hashing via Single-Round MD5

{
  "id": "e6f625b14a74acab6a358b2f63e670d0c2dd1aa2cd2a1994f16bcdaefe09eeae",
  "url": "https://osv.dev/vulnerability/CVE-2026-92921",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "admin3 through 3.0.0 Weak Password Hashing via Single-Round MD5",
    "summary": "admin3 through 3.0.0 stores account passwords using single-round MD5 with only the username as salt and no key derivation function. Attackers with database access can recover plaintext passwords through offline dictionary or brute-force attacks due to negligible computational effort.",
    "evidence": "osv:CVE-2026-92921",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-92921",
      "aliases": [
        "CVE-2026-92921"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cjbi/admin3",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c24d25fe571347cd32662b4e135f826e2ea4b140"
                },
                {
                  "last_affected": "c24d25fe571347cd32662b4e135f826e2ea4b140"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3"
                      },
                      {
                        "last_affected": "3.0.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92921.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.702332337Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92921.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-92921",
        "https://www.vulncheck.com/advisories/admin3-through-3.0.0-weak-password-hashing-via-single-round-md5",
        "https://github.com/cjbi/admin3",
        "https://github.com/cjbi/admin3/blob/3.0.0/admin3-server/src/main/java/tech/wetech/admin3/common/SecurityUtil.java",
        "https://github.com/cjbi/admin3/blob/3.0.0/admin3-server/src/main/java/tech/wetech/admin3/sys/model/UserCredential.java",
        "https://github.com/LinYuanyi1/cve-request-poc/blob/master/admin3/C08_md5_credential_hashing.py"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-916"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92921.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-92921",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492476,
  "published_at": "2026-09-17T12:33:25.228+00:00"
}