Vulnerability · Published Sep 3, 2025 · Assigned by GitHub_M

CVE-2025-58163FreeScout's deserialization of untrusted data can lead to Remote Code Execution

High 8.6

In plain English

A high-severity unsafe deserialization in freescout from freescout-help-desk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 4.0)8.6High

Exploit odds (30 days)0.7%top 45.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
freescout-help-desk	freescout	< 1.8.186

Weakness: CWE-502 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-j94w-q9gj-c37g x_refsource_CONFIRM
https://github.com/freescout-help-desk/freescout/commit/e2de65f3f32f825b4ec5558643ed81438c9a6bc6 x_refsource_MISC
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.186 x_refsource_MISC