Impact Analysis

This vulnerability allows an attacker to read arbitrary local files on the server running the Wallos application without authorization. This can lead to exposure of sensitive information such as configuration files, user data, or system credentials.

Because the attacker can exploit the SSRF and path traversal to access files like `/etc/passwd`, it poses a significant security risk by potentially revealing critical system information that could be used for further attacks or unauthorized access.

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Compliance Impact

I don't know

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Executive Summary

CVE-2026-30828 is a high-severity vulnerability in the Wallos application that involves Server-Side Request Forgery (SSRF) combined with a path traversal issue. Specifically, the vulnerability exists in the POST endpoint `/endpoints/notifications/testwebhooknotifications.php` where the `url` parameter can be manipulated by an attacker.

An attacker can supply a malicious URL such as `file:///etc/passwd` in the JSON payload, causing the server to read sensitive local system files. This happens because the application uses external input to construct file paths without properly sanitizing or neutralizing directory traversal sequences like `..`, allowing attackers to escape the intended directory and access arbitrary files on the server.

The vulnerability corresponds to CWE-29 (Path Traversal) and CWE-918 (Server-Side Request Forgery), as the server does not validate that the requested URL is safe or within an expected domain.

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring for suspicious POST requests to the endpoint `/endpoints/notifications/testwebhooknotifications.php` that include a `url` parameter with potentially malicious values such as file URLs (e.g., `file:///etc/passwd`).'}, {'type': 'paragraph', 'content': 'A practical detection method is to inspect web server logs or use network monitoring tools to identify requests containing the `url` parameter with local file paths or unusual URL schemes.'}, {'type': 'list_item', 'content': "Use command-line tools like `grep` to search server logs for suspicious payloads, for example: `grep -i 'url.*file://' /var/log/nginx/access.log`"}, {'type': 'list_item', 'content': 'Use tools like `curl` or `httpie` to test the endpoint with crafted POST requests containing the `url` parameter to see if local files can be accessed.'}, {'type': 'list_item', 'content': 'Example curl command to test the vulnerability: `curl -X POST -H "Content-Type: application/json" -d \'{"url":"file:///etc/passwd"}\' https://your-wallos-instance/endpoints/notifications/testwebhooknotifications.php`'}] [1]

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Mitigation Strategies

The immediate mitigation step is to upgrade Wallos to version 4.6.2 or later, where this vulnerability has been patched.

If upgrading is not immediately possible, restrict access to the vulnerable endpoint by implementing network-level controls such as firewall rules or IP whitelisting to limit who can send requests.

Additionally, monitor and block suspicious requests containing the `url` parameter with local file paths or unusual URL schemes to prevent exploitation.

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