CVE-2025-6391

Description

Brocade ASCG before 3.3.0 logs JSON Web Tokens (JWT) in log files. An attacker with access to the log files can withdraw the unencrypted tokens with security implications, such as unauthorized access, session hijacking, and information disclosure.

CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-532 CWE-532

Affected Products

Vendor	Product	Versions
broadcom	brocade_active_support_connectivity_gateway	< 3.2.0

References

Advisories & Patches

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/35951

Frequently Asked Questions

What is CVE-2025-6391? +

Brocade ASCG before 3.3.0 logs JSON Web Tokens (JWT) in log files. An attacker with access to the log files can withdraw the unencrypted tokens with security implications, such as unauthorized access, session hijacking, and information disclosure. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-6391? +

CVE-2025-6391 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-6391? +

CVE-2025-6391 affects products from broadcom, specifically: brocade_active_support_connectivity_gateway. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6391? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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