Cloud misconfigurations are now the leading cause of cloud security breaches. Research consistently shows that the vast majority of cloud security incidents, with estimates ranging from 65% to 80%, stem not from sophisticated exploits or zero-day vulnerabilities, but from preventable misconfigurations: overly permissive access policies, publicly exposed storage buckets, unencrypted databases, and misconfigured network security groups.
Cloud Security Posture Management (CSPM) emerged as a technology category specifically to address this challenge. CSPM tools continuously monitor cloud environments for misconfigurations, compliance violations, and security risks, providing organisations with visibility and control over their cloud security posture.
This guide explains what CSPM is, how it works, what it can and cannot do, and how organisations should think about CSPM within their broader security strategy.
What Is CSPM?
CSPM is a category of security tools that automatically assess cloud infrastructure configurations against security best practices, compliance frameworks, and organisational policies. CSPM tools connect to cloud provider APIs (AWS, Azure, GCP, and increasingly multi-cloud) to inventory resources, evaluate their configurations, and identify security risks.
The term was coined by Gartner, who defined CSPM as tools that "continuously manage cloud security posture through prevention, detection, response, and prediction of risks." In practice, CSPM primarily focuses on the prevention and detection elements: identifying misconfigurations before they are exploited and alerting teams when configurations drift from their intended state.
How CSPM Works
CSPM platforms operate through a continuous cycle of discovery, assessment, alerting, and remediation.
Discovery and Inventory
CSPM tools connect to cloud provider APIs using read-only credentials (or in some cases, cross-account roles) to enumerate all cloud resources. This includes compute instances, storage buckets, databases, networking components, identity and access management (IAM) policies, serverless functions, container registries, and Kubernetes clusters.
The discovery process runs continuously or on a scheduled basis, ensuring that newly created resources are assessed promptly. This is critical in cloud environments where resources are provisioned programmatically and can be created in seconds.
Configuration Assessment
Once resources are inventoried, CSPM evaluates their configurations against a library of security rules. These rules codify security best practices and compliance requirements:
- Storage: Are S3 buckets publicly accessible? Is server-side encryption enabled? Are access logging and versioning configured?
- Compute: Are EC2 instances using approved AMIs? Are security groups overly permissive? Are instance metadata service (IMDS) protections enabled?
- Networking: Are network ACLs and security groups following least-privilege principles? Are VPC flow logs enabled? Are unused elastic IP addresses cleaned up?
- Identity: Are IAM policies following least-privilege? Are service accounts using long-lived credentials? Is MFA enforced for privileged accounts? Are unused IAM roles and users identified?
- Databases: Are databases encrypted at rest? Are backups configured? Are database instances publicly accessible?
- Logging and monitoring: Are CloudTrail, Azure Activity Log, and GCP Audit Logs enabled and properly configured? Are log storage buckets protected from tampering?
Compliance Mapping
CSPM tools map their security rules to compliance frameworks: CIS Benchmarks, SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR, NIST CSF, and others. This mapping enables organisations to generate compliance reports that show their adherence to specific frameworks, identify gaps, and track progress over time.
Compliance mapping is particularly valuable for organisations subject to regulatory audit. Rather than manually assessing cloud configurations against compliance requirements, CSPM provides automated, continuous compliance assessment with evidence that auditors can review.
Alerting and Prioritisation
When misconfigurations are detected, CSPM generates alerts with severity ratings, affected resource details, compliance framework mappings, and remediation guidance. Effective CSPM platforms prioritise alerts based on multiple factors:
- Severity: How critical is the misconfiguration? A publicly accessible database with sensitive data is more urgent than a missing tag.
- Exposure: Is the misconfigured resource internet-facing? Internal-only misconfigurations are generally lower priority.
- Data sensitivity: Does the resource contain or process sensitive data? Misconfigurations affecting data stores warrant higher priority.
- Blast radius: If exploited, how much of the environment could be compromised from this resource?
Remediation
CSPM tools offer various remediation capabilities:
Manual remediation guidance: Step-by-step instructions for fixing the misconfiguration, often including the specific API calls or console actions required.
Automated remediation: Some CSPM tools can automatically fix certain misconfigurations. For example, removing public access from an S3 bucket or enabling encryption on an unencrypted resource. Automated remediation requires careful configuration to avoid disrupting production workloads.
Infrastructure-as-code integration: Advanced CSPM tools integrate with Terraform, CloudFormation, and other IaC tools to identify misconfigurations in code before deployment (shift-left security) and to generate remediation pull requests.
Key CSPM Capabilities
Mature CSPM platforms deliver the following capabilities:
Multi-cloud support: Consistent security assessment across AWS, Azure, GCP, and increasingly Oracle Cloud, Alibaba Cloud, and other providers. Multi-cloud support is essential for organisations that use more than one cloud provider, which is the majority of enterprises.
Drift detection: Continuous monitoring that detects when resource configurations change from their intended state. Drift detection catches both deliberate changes (made outside the approved change process) and accidental modifications.
Custom policy creation: The ability to define organisation-specific security policies beyond the vendor's built-in rule library. Every organisation has unique requirements that generic rules cannot fully address.
Integration with DevOps workflows: CSPM that integrates with CI/CD pipelines, ticketing systems (Jira, ServiceNow), and communication platforms (Slack, Teams) enables security findings to be routed to the teams responsible for remediation.
Asset inventory and visualisation: A complete inventory of all cloud resources with relationship mapping that shows how resources are connected. This contextual view is essential for understanding the security implications of individual misconfigurations.
Leading CSPM Tools
The CSPM market includes both standalone products and capabilities embedded within broader cloud security platforms:
Standalone CSPM: Tools like Orca Security, Wiz, and Lacework provide dedicated CSPM capabilities, often combined with cloud workload protection (CWPP) and cloud infrastructure entitlement management (CIEM).
Platform-embedded CSPM: Major security platforms including CrowdStrike, Palo Alto Prisma Cloud, and Microsoft Defender for Cloud include CSPM as part of broader cloud security suites.
Cloud-native tools: AWS Security Hub, Azure Security Centre, and GCP Security Command Centre provide native CSPM capabilities within each cloud provider's ecosystem. These tools are free or low-cost but typically lack multi-cloud support.
When evaluating CSPM tools, organisations should consider multi-cloud breadth, rule library depth, remediation automation capabilities, integration ecosystem, and pricing model.
The Limitations of CSPM
Whilst CSPM is essential for cloud security hygiene, it has fundamental limitations that organisations must understand.
No Runtime Threat Detection
CSPM assesses configurations; it does not detect active threats. A CSPM tool can identify that a security group allows SSH access from any IP address, but it cannot detect that an attacker is actively using that access to exfiltrate data.
This is the most significant limitation of CSPM. Configuration assessment is a preventive control, not a detective one. Organisations that rely solely on CSPM for cloud security have no visibility into active attacks, compromised workloads, or malicious behaviour within their cloud environments.
Point-in-Time Assessment
Although CSPM runs continuously, its assessments are still point-in-time snapshots. Between assessment cycles, misconfigurations can be introduced and exploited before the next scan detects them. The gap between misconfiguration and detection can range from minutes to hours depending on the scan frequency.
Limited Workload Visibility
CSPM operates at the cloud infrastructure layer; it sees resource configurations but not what happens inside compute instances, containers, or serverless functions. It cannot detect malware running on an EC2 instance, data exfiltration from a container, or credential theft within a Lambda function.
Alert Fatigue
Large cloud environments can generate thousands of CSPM findings. Without effective prioritisation, security teams face the same alert fatigue challenge that plagues other security tools. Many CSPM findings are low-severity issues that do not represent practical risk, but they clutter dashboards and consume attention.
Extending CSPM with Unified Detection
The limitations of CSPM point to a clear need: cloud security requires both posture management (preventive) and runtime threat detection (detective). CSPM tells you that a door is unlocked; runtime detection tells you that someone is walking through it.
SenseOn addresses this gap by providing runtime threat detection that complements CSPM capabilities. SenseOn's lightweight agents deploy across cloud workloads, including EC2 instances, containers, and Kubernetes pods, and collect the endpoint and network telemetry needed to detect active threats.
When combined with CSPM, SenseOn's runtime detection delivers defence in depth:
CSPM identifies that a security group is overly permissive. SenseOn detects the attacker exploiting that misconfiguration in real time.
CSPM flags that encryption is disabled on a storage bucket. SenseOn detects anomalous data access patterns that indicate exfiltration.
CSPM reports that an IAM role has excessive permissions. SenseOn detects the compromised credentials being used for lateral movement within the cloud environment.
SenseOn's cross-domain correlation processes cloud workload telemetry alongside endpoint and network data from on-premises infrastructure, providing a unified view of threats that span hybrid environments. Attackers do not respect the boundary between cloud and on-premises; detection platforms should not either.
Building a Cloud Security Strategy
Organisations should approach cloud security as a layered programme:
- Posture management (CSPM): Continuously assess and remediate cloud misconfigurations. This is the foundation, preventing the conditions that enable breaches.
- Workload protection: Deploy runtime detection on cloud compute resources to identify active threats, malware, and anomalous behaviour.
- Identity security: Monitor cloud identity events (authentication, authorisation, privilege escalation) to detect credential compromise and insider threats.
- Network detection: Analyse cloud network traffic (VPC flow logs, DNS queries, API calls) to identify lateral movement, data exfiltration, and command-and-control activity.
- Unified correlation: Correlate signals across all layers, including posture, workload, identity, and network, to detect sophisticated attacks that manifest across multiple domains.
CSPM is an essential component of this strategy, but it is not sufficient on its own. Organisations that invest in CSPM without corresponding runtime detection capabilities have strong preventive controls but limited ability to detect and respond to the threats that inevitably bypass prevention.
