SB20251014105 - Improperly implemented security check for standard in FortiOS and FortiProxy
Published: October 14, 2025
Security Bulletin ID
SB20251014105
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improperly implemented security check for standard (CVE-ID: CVE-2025-25255)
CWE-ID: CWE-358 - Improperly Implemented Security Check for Standard
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote authenticated user to manipulate data.
The vulnerability exists due to improperly implemented security check for standard in explicit web proxy. An authenticated proxy user can bypass the domain fronting protection feature via crafted HTTP requests.
Remediation
Install update from vendor's website.