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CVE-2026-30934

Estado: AnalizadaMedia (5.4)—

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Filebrowser — Filebrowser

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-30934",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-30934",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-10T16:38:59.115847Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.9,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.3
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "gtsteffaniak",
          "product": "filebrowser",
          "versions": [
            {
              "status": "affected",
              "version": ">= 1.3.0-beta, < 1.3.1-beta"
            },
            {
              "status": "affected",
              "version": "< 1.2.2-stable"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-10T18:18:53.257",
  "references": [
    {
      "url": "https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stable",
      "tags": [
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-beta",
      "tags": [
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable."
    },
    {
      "lang": "es",
      "value": "FileBrowser Quantum es un gestor de archivos gratuito, autoalojado y basado en web. Antes de 1.3.1-beta y 1.2.2-stable, es posible un XSS Almacenado a través de campos de metadatos de compartición (p. ej., título, descripción) que se renderizan en HTML para /public/share/ sin escape sensible al contexto. El servidor utiliza text/template en lugar de html/template, permitiendo que los scripts inyectados se ejecuten cuando las víctimas visitan la URL de compartición. Esta vulnerabilidad está corregida en 1.3.1-beta y 1.2.2-stable."
    }
  ],
  "lastModified": "2026-06-17T10:33:10.703",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E9301582-B9B7-431D-B9F0-D2ED8A0F4F0A",
              "versionEndIncluding": "1.2.9"
            },
            {
              "criteria": "cpe:2.3:a:filebrowser:filebrowser:1.2.1:stable:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DE0C44CA-A1E7-4A78-AEBE-9E40AC8356A3"
            },
            {
              "criteria": "cpe:2.3:a:filebrowser:filebrowser:1.3.0:beta:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BBB1EA86-4052-40DC-AAAA-8133DD965699"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}