Executive Summary

CVE-2026-2896 is a vulnerability in funadmin up to version 7.1.0-rc4, specifically in the setConfig function of the file app/backend/controller/Ajax.php. This function lacks proper authentication and authorization checks, allowing an attacker to remotely invoke it without logging in.

As a result, an attacker can send crafted malicious requests to arbitrarily modify system configuration parameters, leading to unauthorized access and potential system compromise.

The vulnerability is categorized under CWE-285 (Improper Authorization) and CWE-862 (Missing Authorization), and it can be exploited remotely without any user interaction.

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Impact Analysis

This vulnerability allows an attacker to remotely modify system configuration settings without authentication, which can lead to unauthorized access and compromise of the affected system.

The impact includes potential breaches of confidentiality, integrity, and availability of the system, as attackers can manipulate critical configuration parameters.

Because exploitation is straightforward and does not require authentication, the risk of attack is high, and the system could be fully compromised.

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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 checking for the presence of the vulnerable endpoint app/backend/controller/Ajax.php, specifically the setConfig function, which lacks proper authorization.'}, {'type': 'paragraph', 'content': 'One method to identify potentially vulnerable systems is to use Google dorking with queries such as: inurl:app/backend/controller/Ajax.php.'}, {'type': 'paragraph', 'content': 'On your system or network, you can monitor for suspicious HTTP requests targeting the setConfig function without authentication, which may indicate exploitation attempts.'}, {'type': 'paragraph', 'content': 'While no specific detection commands are provided, you can use tools like curl or wget to test if the endpoint is accessible without authentication, for example:'}, {'type': 'list_item', 'content': "curl -v http://[target]/app/backend/controller/Ajax.php -d 'action=setConfig&param=value'"}, {'type': 'list_item', 'content': 'Observe if the request is accepted and configuration changes are allowed without authentication.'}] [3]

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Mitigation Strategies

Immediate mitigation steps include restricting access to the vulnerable endpoint app/backend/controller/Ajax.php, especially the setConfig function, by implementing proper authentication and authorization controls.

If possible, block or filter incoming requests to this endpoint from untrusted networks using firewall rules or web application firewalls.

Since the vendor has not provided any patches or mitigations, consider replacing the affected funadmin version 7.1.0-rc4 with a secure alternative or an updated version once available.

Monitor logs for any unauthorized access attempts and respond accordingly.

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