CVE-2025-48389 FreeScout Vulnerable to Deserialization of Untrusted Data
An attacker can achieve arbitrary code execution in FreeScout by passing a serialized object through the set function, which is deserialized during retrieval.
- 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-2025-48389?
CVE-2025-48389 is a high-severity unsafe deserialization vulnerability in freescout-help-desk freescout, published on 29 May 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.178, FreeScout is vulnerable to deserialization of untrusted data due to insufficient validation. Through the set function, a string with a serialized object can be passed, and when getting an option through the get method, deserialization will occur, which will allow arbitrary code execution This issue has been patched in version 1.8.178.
Weakness: CWE-502
Which versions are affected by CVE-2025-48389?
It affects 1 product.
Products include Freescout Freescout.
How do I fix CVE-2025-48389?
No fix has been published for CVE-2025-48389 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-2025-48389 being exploited?
There is no known exploitation of CVE-2025-48389 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-jmpv-8q3h-2m8v.