CVE-2019-9185: Bolt Unrestricted Upload of File with Dangerous Type

bolt/bolt Updated 02 Oct 2025

Summary

13/05/2022

Disclosed on

CVE-2019-9185

CVE

Yes i

Fix available

High

Severity

8.8

CVSS Score

CVE-2019-9185: Bolt Unrestricted Upload of File with Dangerous Type. Affects bolt/bolt versions < 3.6.5. Fixed in 3.6.5. How to fix ↓

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Background

Bolt is an open-source content management system (CMS) written in PHP. It provides a flexible platform for creating and managing websites. The vulnerability in Bolt, identified as CVE-2019-9185, allows remote attackers to execute arbitrary PHP code by renaming a previously uploaded file to have a .php extension.

Vulnerability Detail

The vulnerability arises from a flaw in the Controller/Async/FilesystemManager.php file in the file manager component of Bolt. Attackers can exploit this vulnerability by renaming a file that was previously uploaded to the system, giving it a .php extension. This allows them to execute arbitrary PHP code, potentially leading to unauthorized access, data breaches, or other malicious activities.

How To Fix

Minimum fixed version

3.6.5

This is the first release that contains the fix.

composer require bolt/bolt:3.6.5

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Workaround

There is no known workaround for this vulnerability. It is essential to update to the fixed version of Bolt as soon as possible.

Conclusion

The vulnerability in Bolt allows remote attackers to execute arbitrary PHP code by renaming a previously uploaded file to have a .php extension. To mitigate this risk, it is crucial to update Bolt to version 3.6.5 or later. For further support on vulnerability remediation, you can reach out to DevNack.com.

See every vulnerability recorded for bolt/bolt →