Froxlor 2.0.21 - Remote Command Execution

8

High

Discovered by 

Ronald Hernandez

Offensive Team, Fluid Attacks

Summary

Full name

Froxlor 2.0.21 - Remote Command Execution

Code name

State

Private

Release date

Aug 11, 2023

Affected product

Froxlor 2.0.21

Affected version(s)

Version 2.0.21

Vulnerability name

Remote Command Execution

Remotely exploitable

Yes

CVSS v3.1 vector string

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:H/RL:U/RC:C

CVSS v3.1 base score

8.0

Exploit available

Yes

CVE ID(s)

Description

Froxlor allows an user to execute commands on the server by abusing the built-in image upload and cron jobs functionality.

Vulnerability

Remote Command Execution (RCE) vulnerability has been identified in Froxlor, is possible to upload images profiles without properly validating the type and content, the application also allows creating cron jobs without proper validation of dangerous commands, these two flaws lead to remote code execution.

Exploitation

Will be available soon.

Evidence of exploitation

In the Portal of Froxlor , we need to go to System -> Settings -> Panel Settings and Upload a Logo Image, then with have to add our payload in the image content:

after that, we need get the image name, and go to System -> Cronjob settings and add our payload:

finally, we need to wait for cron job task execute the mv commad that change the image to php extension and this allow to execute command in the server

Our security policy

We have reserved the ID CVE-2023-3895 to refer to this issue from now on. Disclosure policy

System Information

  • Version: Froxlor 2.0.21

  • Operating System: Linux

Mitigation

There is currently no patch available for this vulnerability.

References

Timeline

Vulnerability discovered

Jul 24, 2023

Vendor Confirmed Vuln.

Jul 25, 2023

Vendor contacted

Jul 24, 2023

Vendor replied

Jul 25, 2023

Public disclosure

Aug 11, 2023

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Fluid Attacks' solutions enable organizations to identify, prioritize, and remediate vulnerabilities in their software throughout the SDLC. Supported by AI, automated tools, and pentesters, Fluid Attacks accelerates companies' risk exposure mitigation and strengthens their cybersecurity posture.

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Fluid Attacks' solutions enable organizations to identify, prioritize, and remediate vulnerabilities in their software throughout the SDLC. Supported by AI, automated tools, and pentesters, Fluid Attacks accelerates companies' risk exposure mitigation and strengthens their cybersecurity posture.

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© 2025 Fluid Attacks. We hack your software.

Fluid Attacks' solutions enable organizations to identify, prioritize, and remediate vulnerabilities in their software throughout the SDLC. Supported by AI, automated tools, and pentesters, Fluid Attacks accelerates companies' risk exposure mitigation and strengthens their cybersecurity posture.

SOC 2 Type II

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© 2025 Fluid Attacks. We hack your software.