CVE-2025-58163 FreeScout's deserialization of untrusted data can lead to Remote Code Execution
Authenticated attackers with APP_KEY knowledge can achieve remote code execution in FreeScout via unsafe deserialization in decryption logic.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-58163?
CVE-2025-58163 is a high-severity unsafe deserialization vulnerability in freescout-help-desk freescout, published on 3 Sep 2025. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-502
Which versions are affected by CVE-2025-58163?
It affects 1 product.
Products include Freescout Freescout.
How do I fix CVE-2025-58163?
No fix has been published for CVE-2025-58163 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-58163 being exploited?
There is no known exploitation of CVE-2025-58163 in the wild and no public exploit code.
Other vulnerabilities in freescout-help-desk freescout
- CVE-2026-28289 FreeScout 1.8.206 Patch Bypass for CVE-2026-27636 via Zero-Width Space Character Leads to Remote Code Execution
- CVE-2026-27637 FreeScout's Predictable Authentication Token Enables Account Takeover
- CVE-2026-32754 FreeScout: Stored XSS via Unescaped Email Template Rendering ({!! $thread->body !!})
- CVE-2024-29185 FreeScout OS Command Injection vulnerability
- CVE-2026-40498 FreeScout has Authentication Bypass and Information Disclosure in SystemController via /system/cron
Sources
Also known as GHSA-j94w-q9gj-c37g.