CVE-2026-3289 in PublicCMS
Summary
by MITRE • 02/27/2026
A weakness has been identified in Sanluan PublicCMS 6.202506.d. This impacts the function saveMetadata of the file TemplateCacheComponent.java of the component Template Cache Generation. Executing a manipulation can lead to path traversal. 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 • 03/03/2026
The vulnerability identified in Sanluan PublicCMS 6.202506.d represents a critical path traversal flaw within the Template Cache Generation component, specifically affecting the saveMetadata function in TemplateCacheComponent.java. This weakness enables attackers to manipulate file system paths and potentially access or modify sensitive files beyond the intended directory structure. The vulnerability's remote exploitability means that malicious actors can leverage this flaw without requiring physical access to the target system, making it particularly dangerous in web-facing environments where the application serves content to external users. The public availability of exploit code significantly increases the risk profile, as it lowers the barrier to entry for potential attackers who may not possess advanced technical skills to develop custom exploitation methods.
The technical implementation of this path traversal vulnerability stems from inadequate input validation and sanitization within the TemplateCacheComponent.java file. When the saveMetadata function processes user-supplied data, it fails to properly validate or sanitize path parameters, allowing attackers to inject malicious path sequences such as directory traversal characters. This flaw directly maps to CWE-22, which defines path traversal vulnerabilities as weaknesses that occur when an application allows access to files and directories stored outside the intended directory, typically by manipulating input data to navigate the file system. The vulnerability operates by exploiting insufficient restrictions on file access paths, enabling attackers to bypass normal access controls and potentially execute arbitrary code or access sensitive system resources.
The operational impact of this vulnerability extends beyond simple file access violations, as it can potentially lead to complete system compromise when combined with other attack vectors. Remote exploitation capabilities mean that attackers can target the application from anywhere on the internet, making it a prime target for automated scanning and exploitation campaigns. The lack of vendor response to early disclosure attempts creates a particularly concerning scenario where organizations may continue to operate vulnerable systems without official patches or mitigation guidance. This vulnerability could enable attackers to read configuration files, access database credentials, upload malicious files, or even establish persistent backdoors within the affected systems. The implications are especially severe for content management systems where template caching is frequently used, as attackers could potentially manipulate cached templates to inject malicious code into the application's execution flow.
Organizations utilizing Sanluan PublicCMS 6.202506.d should implement immediate mitigations while awaiting official vendor patches or updates. The primary defensive measures include implementing strict input validation on all parameters that influence file system operations, particularly those used in template cache generation processes. Network-level protections such as web application firewalls should be configured to block suspicious path traversal patterns and monitor for exploitation attempts. System administrators should also consider restricting file system permissions for the application directory, ensuring that the application process runs with minimal required privileges. Additionally, regular security monitoring and log analysis should be implemented to detect potential exploitation attempts, as the vulnerability could be used for reconnaissance activities before more damaging attacks are launched. Organizations should also consider implementing application whitelisting and sandboxing techniques to limit the potential impact of successful exploitation attempts. The absence of vendor response necessitates proactive security measures and potentially exploring alternative solutions or vendor support options to address this critical vulnerability effectively.