CVE-2026-92247 in synaptik-cms
Summary
by MITRE • 09/16/2026
A security vulnerability has been detected in synaptikcms synaptik-cms up to 1.3.4.4. This affects the function rename of the file admin/file-manager.php of the component Admin File Manager. The manipulation leads to unrestricted upload. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 1.3.5 is able to mitigate this issue. It is suggested to upgrade the affected component.
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within Synaptik CMS, specifically affecting versions up through 1.3.4.4, in the administrative file management module located at admin/file-manager.php. This flaw centers on the rename functionality of the system, which fails to adequately validate or sanitize inputs when handling file operations. The core technical deficiency is a lack of proper access control and input validation during the renaming process, allowing an attacker to manipulate file paths or extensions in ways that bypass intended security restrictions. By exploiting this logic error, an adversary can achieve unrestricted upload capabilities, effectively circumventing standard file type checks and directory traversal protections that are typically enforced by web application firewalls or server configurations.
From a technical perspective, the vulnerability is classified under CWE-434, which describes the ability to upload arbitrary files with potentially dangerous content such as executable scripts or malware. This flaw enables an attacker to place malicious PHP shells or other script-based payloads into directories where they can be executed by the web server. The attack vector is remote and requires no special privileges beyond those granted to a user who has access to the file manager interface, although in many CMS deployments, administrative interfaces may have limited exposure depending on configuration. However, if authentication credentials are compromised or if the system allows unauthenticated access to certain parts of the admin panel, exploitation becomes significantly more feasible. The presence of publicly disclosed exploits indicates that automated tools and scripts exist which can leverage this weakness without requiring custom development effort from threat actors.
The operational impact of this vulnerability is severe, as it directly compromises the integrity and confidentiality of the web application environment. Successful exploitation allows for remote code execution on the underlying server hosting Synaptik CMS. This can lead to complete system compromise, including data exfiltration, defacement, installation of backdoors, or use of the compromised host as a pivot point for further attacks within an internal network. The ability to upload arbitrary files undermines the fundamental security model of web applications, which rely on separating code from user-uploaded content. Once malicious scripts are uploaded and executed, attackers can escalate privileges, modify database contents, or disrupt service availability by consuming resources or deleting critical system files.
Mitigation strategies must prioritize immediate remediation through software updates. The vendor has released version 1.3.5 which addresses the underlying code flaws in the file manager component. Organizations running affected versions should upgrade to this patched release as soon as possible to eliminate the vulnerability at its source. In cases where upgrading is not immediately feasible, temporary mitigations include restricting access to the admin directory using IP whitelisting or strong authentication mechanisms such as multi-factor authentication. Additionally, implementing strict web application firewall rules that detect and block common file upload patterns associated with this exploit can provide a layer of defense in depth. Regular security audits and penetration testing should be conducted to ensure no other similar vulnerabilities exist within the CMS installation, particularly those related to input validation and access control mechanisms aligned with OWASP Top 10 standards for insecure direct object references and broken access control.