Fortinet FortiAuthenticator up to 6.3.4/6.4.10/6.5.6/6.6.6 direct request

Summaryinfo

A vulnerability was found in Fortinet FortiAuthenticator up to 6.3.4/6.4.10/6.5.6/6.6.6 and classified as problematic. Affected is an unknown function. Such manipulation leads to direct request. This vulnerability is traded as CVE-2025-57823. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Fortinet FortiAuthenticator up to 6.3.4/6.4.10/6.5.6/6.6.6 and classified as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a direct request vulnerability. Using CWE to declare the problem leads to CWE-425. The web application does not adequately enforce appropriate authorization on all restricted URLs, scripts, or files. Impacted is confidentiality. CVE summarizes:

A direct request ('forced browsing') vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow an authenticated attacker with at least sponsor permissions to read and download device logs via accessing specific endpoints

The advisory is shared for download at fortiguard.fortinet.com. This vulnerability is handled as CVE-2025-57823 since 08/20/2025. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are needed for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-2806). Once again VulDB remains the best source for vulnerability data.

Affected

• Fortinet FortiAuthenticator

Productinfo

Vendor

• Fortinet

Name

• FortiAuthenticator

Version

• 6.3.0
• 6.3.1
• 6.3.2
• 6.3.3
• 6.3.4
• 6.4.0
• 6.4.1
• 6.4.2
• 6.4.3
• 6.4.4
• 6.4.5
• 6.4.6
• 6.4.7
• 6.4.8
• 6.4.9
• 6.4.10
• 6.5.0
• 6.5.1
• 6.5.2
• 6.5.3
• 6.5.4
• 6.5.5
• 6.5.6
• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion