Executive Summary

CVE-2026-32268 is a critical vulnerability in the Craft CMS Azure Blob Storage plugin versions 2.0.0-beta.1 up to 2.1.0. It allows unauthenticated users who have a valid CSRF token to access the DefaultController->actionLoadContainerData() endpoint and retrieve a list of Azure storage buckets that the plugin can access.

This happens because the plugin lacks proper authorization checks on this endpoint, leading to unauthorized disclosure of potentially sensitive information. Additionally, Azure may return sensitive data in error messages, which exposes further attack vectors.

The vulnerability was fixed in version 2.1.1 by adding authorization checks to ensure only users with administrative privileges can access this data.

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Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive information by allowing unauthenticated users to view a list of Azure storage buckets accessible by the plugin.

Because Azure may include sensitive data in error messages, attackers could exploit this to gain additional information about the storage environment.

Such information disclosure can increase the risk of further attacks, data breaches, or unauthorized access to cloud storage resources.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by attempting to access the DefaultController->actionLoadContainerData() endpoint without authentication but with a valid CSRF token. If the endpoint returns a list of Azure storage buckets, the system is vulnerable.'}, {'type': 'paragraph', 'content': 'A practical approach is to send a POST request with a valid CSRF token to the vulnerable endpoint and observe if bucket data is returned.'}, {'type': 'list_item', 'content': 'Use curl or similar tools to send a POST request to the endpoint, for example:'}, {'type': 'list_item', 'content': 'curl -X POST -H "X-CSRF-Token: <valid_token>" -H "Accept: application/json" https://<your-craftcms-site>/actions/azure-blob/default/load-container-data'}, {'type': 'paragraph', 'content': 'If the response contains a list of buckets without requiring authentication, the vulnerability is present.'}] [1, 2]

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Mitigation Strategies

The immediate and recommended mitigation step is to update the Azure Blob Storage plugin for Craft CMS to version 2.1.1 or later.

Version 2.1.1 introduces authorization checks that restrict access to the actionLoadContainerData() endpoint to authenticated administrators only, preventing unauthorized disclosure of bucket information.

Until the update can be applied, consider restricting access to the vulnerable endpoint by network controls or web application firewall rules to block unauthenticated requests.

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