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CVE-2026-54804

Status: DeferredHigh (7.6)—

Subscriber Broken Authentication in Melhor Envio <= 2.16.3 versions.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Autenticación rota (CWE-288) en servicio remoto con acceso autenticado (PR:L) permite bypass de credenciales (T1078) e integridad de datos afectada (I:L).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account ManagementNetwork SegmentationApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Melhor Envio — Melhor EnvioAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-54804",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54804",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-17T15:20:17.020324Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "audit@patchstack.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "audit@patchstack.com",
      "affectedData": [
        {
          "vendor": "melhorenvio",
          "product": "Melhor Envio",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "2.16.4",
                  "status": "unaffected"
                }
              ],
              "version": "n/a",
              "versionType": "custom",
              "lessThanOrEqual": "2.16.3"
            }
          ],
          "packageName": "melhor-envio-cotacao",
          "collectionURL": "https://wordpress.org/plugins",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-06-17T13:20:51.473",
  "references": [
    {
      "url": "https://patchstack.com/database/wordpress/plugin/melhor-envio-cotacao/vulnerability/wordpress-melhor-envio-plugin-2-16-3-broken-authentication-vulnerability?_s_id=cve",
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      "value": "Subscriber Broken Authentication in Melhor Envio <= 2.16.3 versions."
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  ],
  "lastModified": "2026-06-17T17:17:26.730",
  "sourceIdentifier": "audit@patchstack.com"
}