freescout-help-desk freescout up to 1.8.185 app/Helper.php customer_id/timestamp deserialization

Summaryinfo

A vulnerability was found in freescout-help-desk freescout up to 1.8.185 and classified as problematic. Impacted is an unknown function of the file app/Helper.php. Executing a manipulation of the argument customer_id/timestamp can lead to deserialization. This vulnerability appears as CVE-2025-58163. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in freescout-help-desk freescout up to 1.8.185. This vulnerability affects an unknown code of the file app/Helper.php. The manipulation of the argument customer_id/timestamp with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Versions 1.8.185 and earlier contain a deserialization of untrusted data vulnerability that allows authenticated attackers with knowledge of the application's APP_KEY to achieve remote code execution. The vulnerability is exploited via endpoint, e.g.: `/help/{mailbox_id}/auth/{customer_id}/{hash}/{timestamp}` where the `customer_id` and `timestamp` parameters are processed through the decrypt function in `app/Helper.php` without proper validation. The code decrypts using Laravel's built-in encryption functions, which subsequently deserialize the decrypted payload without sanitization, allowing attackers to craft malicious serialized PHP objects using classes to trigger arbitrary command execution. This is fixed in version 1.8.186.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-58163 since 08/27/2025. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. There are known technical details, but no exploit is available.

By approaching the search of inurl:app/Helper.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.8.186 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch e2de65f3f32f825b4ec5558643ed81438c9a6bc6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• freescout-help-desk

Name

• freescout

Version

• 1.8.185

License

• open-source

Website

• Product: https://github.com/freescout-help-desk/freescout/

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Once again VulDB remains the best source for vulnerability data.

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