CVE-2025-6736 in juzaweb
Summary
by MITRE • 06/27/2025
A vulnerability classified as critical was found in juzaweb CMS 3.4.2. Affected by this vulnerability is an unknown functionality of the file /admin-cp/theme/install of the component Add New Themes Page. The manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 07/01/2025
This critical vulnerability in juzaweb CMS 3.4.2 represents a significant security flaw within the administrative control panel's theme installation functionality. The vulnerability exists in the /admin-cp/theme/install endpoint of the Add New Themes Page component, where improper authorization mechanisms allow unauthorized users to bypass legitimate access controls. This flaw fundamentally undermines the CMS's security model by enabling malicious actors to install themes without proper authentication, potentially leading to complete system compromise. The vulnerability's classification as critical stems from its remote exploitability and the fact that public exploitation methods have already been disclosed, making it immediately actionable by threat actors.
The technical implementation of this vulnerability likely involves insufficient input validation and authentication checks within the theme installation process. Attackers can manipulate the application's authorization flow to gain administrative privileges or directly install malicious themes that could execute arbitrary code on the target system. This improper authorization mechanism creates a persistent backdoor opportunity that aligns with CWE-285, which addresses improper authorization in software systems. The flaw demonstrates a failure in the principle of least privilege, where the application does not adequately verify user credentials or roles before granting access to sensitive administrative functions.
Operationally, this vulnerability poses severe risks to organizations using juzaweb CMS 3.4.2, as it enables remote code execution through theme installation and potentially full system compromise. The attack surface expands significantly since the vulnerability exists in the administrative interface, which is typically protected by strong authentication mechanisms. Threat actors can leverage this flaw to install malicious themes containing web shells, backdoors, or other malicious payloads that persist even after system reboots. The fact that the exploit has been publicly disclosed creates an immediate risk for unpatched systems, as evidenced by the vendor's lack of response to early disclosure attempts.
Security mitigations for this vulnerability should include immediate patching of the juzaweb CMS to the latest version that addresses the authorization flaw. Organizations should implement network segmentation to limit access to administrative interfaces and deploy web application firewalls to monitor for suspicious theme installation requests. Additional protective measures include disabling unnecessary administrative functions, implementing multi-factor authentication for admin accounts, and conducting regular security audits of installed themes. This vulnerability exemplifies ATT&CK technique T1078 which covers legitimate credentials and the use of administrative tools for persistence. The lack of vendor response underscores the importance of proactive security measures and the need for organizations to maintain independent vulnerability assessment capabilities rather than relying solely on vendor disclosures.