HomeMalware & ThreatsLektor Static CMS 3.3.10 Arbitrary File Upload and Remote Code Execution

Lektor Static CMS 3.3.10 Arbitrary File Upload and Remote Code Execution

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A critical security flaw has been discovered in Lektor Static CMS version 3.3.10, leaving users vulnerable to remote code execution due to an arbitrary file upload vulnerability. This exploit, discovered by kai6u, has raised concerns among cybersecurity experts as it could potentially lead to devastating consequences if exploited by malicious actors.

The exploit allows attackers to upload files to any directory on the server, granting them the ability to execute commands remotely. By accessing the administrator console and utilizing the Add Page function, attackers can create a file containing malicious payload and then proceed to execute commands on the targeted server.

The steps of the attack involve first uploading the payload to the templates directory using the Add Page feature, followed by executing arbitrary commands by referencing the file containing the payload. This method allows attackers to gain unauthorized access to sensitive files, manipulate system configurations, use the server as a pivot point for further attacks, encrypt server content for ransom, or even shut down the server to disrupt operations.

The impact of such an exploit is severe, as it not only compromises the security and integrity of the affected server but also poses a significant threat to any connected systems or data. The ability to execute arbitrary commands through the administrator console opens up a wide range of possibilities for malicious actors to exploit the system for their own gain.

To mitigate this vulnerability, users are advised to update their Lektor Static CMS to the latest version, v3.3.11, which contains fixes for this arbitrary file upload issue. By ensuring that their software is up to date, users can protect themselves against potential attacks and prevent unauthorized access to their servers.

It is crucial for organizations and individuals using Lektor Static CMS to stay informed about security vulnerabilities and take proactive measures to secure their systems. By following best practices for cybersecurity and staying vigilant against potential threats, users can safeguard their data and networks from exploitation by malicious actors.

References:
– https://book.hacktricks.xyz/pentesting-web/ssti-server-side-template-injection/jinja2-ssti
– https://github.com/lektor/lektor/releases/tag/v3.3.11

In conclusion, the discovery of this arbitrary file upload vulnerability in Lektor Static CMS serves as a stark reminder of the importance of maintaining strong cybersecurity practices and staying informed about potential risks. By addressing such vulnerabilities promptly and ensuring that software is kept up to date, users can mitigate the risk of exploitation and protect their systems from unauthorized access and compromise.

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