CVE-2026-2896 in funadmin
Summary
by MITRE • 02/22/2026
A weakness has been identified in funadmin up to 7.1.0-rc4. This affects the function setConfig of the file app/backend/controller/Ajax.php of the component Configuration Handler. Executing a manipulation can lead to improper authorization. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/23/2026
The vulnerability identified in funadmin version 7.1.0-rc4 represents a critical authorization bypass flaw within the Configuration Handler component that specifically affects the setConfig function located in app/backend/controller/Ajax.php. This weakness enables attackers to manipulate the configuration settings of the application without proper authentication or authorization, fundamentally undermining the security model of the system. The vulnerability exists due to insufficient validation and access control checks within the configuration management interface, allowing malicious actors to execute arbitrary configuration changes that could compromise the entire application infrastructure.
The technical implementation of this flaw stems from inadequate input validation and privilege verification within the Ajax controller's configuration handler. When the setConfig function processes incoming requests, it fails to properly authenticate the requesting user or verify that the user possesses the necessary permissions to modify system configurations. This represents a direct violation of the principle of least privilege and demonstrates a failure in implementing proper access control mechanisms. The vulnerability is classified as a weakness in the authorization framework and can be categorized under CWE-285 which specifically addresses improper authorization issues in software systems.
From an operational perspective, this vulnerability poses significant risks to organizations utilizing funadmin versions up to 7.1.0-rc4. Remote exploitation allows attackers to modify critical system parameters, potentially leading to complete system compromise, data exfiltration, or service disruption. The public availability of exploitation tools increases the likelihood of successful attacks, as threat actors can readily leverage this vulnerability without requiring advanced technical skills. The lack of vendor response to prior disclosure attempts creates a particularly concerning scenario where organizations remain exposed to known threats without official patches or mitigation guidance.
The impact of this vulnerability extends beyond simple configuration manipulation, as unauthorized configuration changes could enable attackers to disable security features, modify user permissions, or establish persistent backdoors within the application. This type of vulnerability aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and T1566 which addresses 'Phishing for Information'. Organizations may find their systems compromised through this vector, potentially leading to broader security breaches within their network infrastructure. The remote execution capability means that attackers can exploit this vulnerability from anywhere on the internet without requiring physical access to the target system.
Organizations should immediately implement mitigations including disabling the affected Ajax controller functionality, implementing additional authentication layers, and monitoring for unauthorized configuration changes. The absence of vendor response necessitates proactive security measures where organizations must develop their own temporary workarounds or consider alternative security solutions. Security teams should also implement network monitoring to detect unusual configuration change patterns and establish incident response procedures specifically addressing this type of authorization bypass vulnerability. The exploitation of such vulnerabilities highlights the critical importance of maintaining up-to-date software versions and having robust vulnerability management processes in place to prevent exploitation of known security flaws.