CVE-2025-6391

JSON Web Token (JWT) Exposure in Log Files

Published Jul 17, 2025 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-21828 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.
History
Type Values Removed Values Added
First Time appeared Broadcom
Broadcom brocade Active Support Connectivity Gateway
CPEs cpe:2.3:a:brocade:ascg:*:*:*:*:*:*:*:* cpe:2.3:a:broadcom:brocade_active_support_connectivity_gateway:*:*:*:*:*:*:*:*
Vendors & Products Brocade
Brocade ascg
Broadcom
Broadcom brocade Active Support Connectivity Gateway
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Type Values Removed Values Added
First Time appeared Brocade
Brocade ascg
CPEs cpe:2.3:a:brocade:ascg:*:*:*:*:*:*:*:*
Vendors & Products Brocade
Brocade ascg
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title JSON Web Token (JWT) Exposure in Log Files
Weaknesses CWE-532
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
brocade
Published
Updated
Jul 18, 2025, 2:11 PM
Reserved
Jun 20, 2025, 2:59 AM
Status
Analyzed
Published
Jul 17, 2025, 10:15 PM
Modified
Jun 17, 2026, 10:01 AM