CVE-2025-54366
CVSS v3
8.8
HIGH
EPSS Score
3.8 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
FreeScout is a lightweight free open source help desk and shared inbox built with PHP (Laravel framework). In versions 1.8.185 and below, there is a critical deserialization vulnerability in the /conversation/ajax endpoint that allows authenticated users with knowledge of the APP_KEY to achieve remote code execution. The vulnerability occurs when the application processes the attachments_all and attachments POST parameters through the insecure Helper::decrypt() function, which performs unsafe de
Technical details
- CVSS v3 Vector
- 3.1
- Published
- 2025-07-26
- Last Modified
- 2025-09-11
Frequently asked questions
What is CVE-2025-54366?
FreeScout is a lightweight free open source help desk and shared inbox built with PHP (Laravel framework). In versions 1.8.185 and below, there is a critical deserialization vulnerability in the /conversation/ajax endpoint that allows authenticated users with knowledge of the APP_KEY to achieve remote code execution. The vulnerability occurs when the application processes the attachments_all and attachments POST parameters through the insecure Helper::decrypt() function, which performs unsafe de
Is CVE-2025-54366 actively exploited?
Active exploitation of CVE-2025-54366 has not been confirmed. The EPSS score is 3.8%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-54366?
CVE-2025-54366 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string 3.1.
Is CVE-2025-54366 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 500 free checks/month · Free API key
Other 2025 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).