Improper Authentication in Graylog - CVE-2025-30373
Published: April 7, 2025 / Updated: June 25, 2026
Vulnerability identifier: #VU135310
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-30373
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Graylog
Affected software:
Graylog
Graylog
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass HTTP input authentication and inject messages.
The vulnerability exists due to improper authentication in HTTP inputs when handling HTTP-based ingestion requests with a missing or incorrect Authorization header. A remote attacker can send a specially crafted request to bypass HTTP input authentication and inject messages.
The server returns an HTTP 401 response even though the message is still ingested.
How to mitigate CVE-2025-30373
Install security update from vendor's website.