Administrator code execution via unsafe option deserialization
Published May 29, 2025 · Updated May 30, 2025
Deserialization in FreeScout before 1.8.178 allows remote authenticated users with administrator access to execute code on the server. App\Option::set stores attacker-controlled serialized objects, and App\Option::get passes the stored value to PHP unserialize without restricting object classes. Administrator access and a valid session are required; successful exploitation reads or writes server files and runs commands with the web application's privileges.
Summary
What happened
Deserialization in FreeScout before 1.8.178 allows remote authenticated users with administrator access to execute code on the server. App\Option::set stores attacker-controlled serialized objects, and App\Option::get passes the stored value to PHP unserialize without restricting object classes. Administrator access and a valid session are required; successful exploitation reads or writes server files and runs commands with the web application's privileges.
The record
- CVE
- CVE-2025-48389
- Published
- May 29, 2025
- Updated
- May 30, 2025
- Vendor
- FreeScout
- Product
- FreeScout
- Classifications
- CWE-502, T1059
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- May 29, 2025CVE publishedPublication date reported by the CVE source.
- May 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.8.178
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Vendor advisory serialized-object proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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