FKIE_CVE-2026-21433

Vulnerability from fkie_nvd - Published: 2026-01-02 19:15 - Updated: 2026-06-17 10:18
Severity
7.7 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
Emlog is an open source website building system. Versions up to and including 2.5.19 are vulnerable to server-side Out-of-Band (OOB) requests / SSRF via uploaded SVG files. An attacker can upload a crafted SVG to http[:]//emblog/admin/media[.]php which contains external resource references. When the server processes/renders the SVG (thumbnailing, preview, or sanitization), it issues an HTTP request to the attacker-controlled host. Impact: server-side SSRF/OOB leading to internal network probing and potential metadata/credential exposure. As of time of publication, no known patched versions are available.
References
security-advisories@github.comhttps://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4Exploit, Vendor Advisory
Impacted products
Vendor Product Version
emlog emlog *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "emlog",
          "vendor": "emlog",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 2.5.19"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:emlog:emlog:*:*:*:*:pro:*:*:*",
              "matchCriteriaId": "72E4E5DE-A4A2-4326-B8EE-71690D75F7AE",
              "versionEndIncluding": "2.5.19",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Emlog is an open source website building system. Versions up to and including 2.5.19 are vulnerable to server-side Out-of-Band (OOB) requests / SSRF via uploaded SVG files. An attacker can upload a crafted SVG to http[:]//emblog/admin/media[.]php which contains external resource references. When the server processes/renders the SVG (thumbnailing, preview, or sanitization), it issues an HTTP request to the attacker-controlled host. Impact: server-side SSRF/OOB leading to internal network probing and potential metadata/credential exposure. As of time of publication, no known patched versions are available."
    },
    {
      "lang": "es",
      "value": "Emlog es un sistema de construcci\u00f3n de sitios web de c\u00f3digo abierto. Las versiones hasta la 2.5.19 inclusive son vulnerables a solicitudes fuera de banda (OOB) del lado del servidor / SSRF a trav\u00e9s de archivos SVG subidos. Un atacante puede subir un SVG manipulado a http[:]//emblog/admin/media[.]php que contiene referencias a recursos externos. Cuando el servidor procesa/renderiza el SVG (generaci\u00f3n de miniaturas, vista previa o sanitizaci\u00f3n), emite una solicitud HTTP al host controlado por el atacante. Impacto: SSRF/OOB del lado del servidor que conduce a sondeo de red interna y posible exposici\u00f3n de metadatos/credenciales. En el momento de la publicaci\u00f3n, no hay versiones parcheadas conocidas disponibles."
    }
  ],
  "id": "CVE-2026-21433",
  "lastModified": "2026-06-17T10:18:39.777",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21433",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-05T20:30:21.079318Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-02T19:15:48.187",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/emlog/emlog/security/advisories/GHSA-6rwr-c8hc-mjj4"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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