CVE-2025-24986
📋 TL;DR
This vulnerability in Azure PromptFlow allows unauthorized attackers to execute arbitrary code remotely due to improper isolation between components. It affects organizations using Azure PromptFlow for AI workflow automation. Attackers can exploit this over the network without authentication.
💻 Affected Systems
- Azure PromptFlow
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of Azure PromptFlow instances leading to data exfiltration, lateral movement within Azure environments, and deployment of persistent backdoors.
Likely Case
Unauthorized code execution allowing attackers to access sensitive AI models, training data, and prompt configurations stored in PromptFlow.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external access to vulnerable components.
🎯 Exploit Status
Network-based exploitation without authentication required. Attackers need knowledge of Azure PromptFlow architecture.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest Azure PromptFlow service update
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24986
Restart Required: No
Instructions:
1. Log into Azure Portal 2. Navigate to PromptFlow service 3. Apply latest service updates 4. Verify update completion in service health dashboard
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to Azure PromptFlow endpoints using Azure Network Security Groups
az network nsg rule create --resource-group <RG> --nsg-name <NSG> --name DenyPromptFlowExternal --priority 100 --direction Inbound --access Deny --protocol '*' --source-address-prefixes '*' --source-port-ranges '*' --destination-address-prefixes <PromptFlowIP> --destination-port-ranges '*'
Access Control
allImplement strict Azure RBAC controls limiting who can access PromptFlow management interfaces
az role assignment create --assignee <UserPrincipal> --role 'PromptFlow Reader' --scope /subscriptions/<SubID>/resourceGroups/<RG>/providers/Microsoft.MachineLearningServices/workspaces/<Workspace>
🧯 If You Can't Patch
- Isolate PromptFlow instances in dedicated Azure Virtual Networks with strict inbound/outbound rules
- Implement Azure Private Link for PromptFlow to prevent public internet exposure
🔍 How to Verify
Check if Vulnerable:
Check Azure Portal > PromptFlow service > Properties for version information and compare with patched versionCheck Version:
az resource show --ids /subscriptions/<SubID>/resourceGroups/<RG>/providers/Microsoft.MachineLearningServices/workspaces/<Workspace> --query properties.promptFlowVersionVerify Fix Applied:
Verify service shows latest update applied in Azure Service Health and no vulnerable versions reported📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns to PromptFlow endpoints
- Unexpected process execution in PromptFlow containers
- Suspicious network connections from PromptFlow instances
Network Indicators:
- Anomalous outbound connections from PromptFlow to unknown external IPs
- Unexpected protocol usage on PromptFlow ports
SIEM Query:
AzureDiagnostics | where ResourceProvider == "MICROSOFT.MACHINELEARNINGSERVICES" and OperationName contains "PromptFlow" and ResultType == "Failure" and ClientIP != internal_range