In short
- CVE-2025-30373 is a MEDIUM (CVSS 5.3) vulnerability affecting org.graylog2:graylog2-server, graylog (graylog).
- Chance of exploitation in the next 30 days (EPSS): 0.34%, higher than 27.0% of all vulnerabilities.
- Fix: update to 6.1.9 or later.
Description
Impact
Starting with 6.1, HTTP Inputs can be configured to check if a specified header is present and has a specified value to authenticate HTTP-based ingestion. Unfortunately, even though in cases of a missing header or a wrong value the correct HTTP response (401) is returned, the message will be ingested nonetheless.
Patches
Workarounds
Disabling http-based inputs and allow only authenticated pull-based inputs.
Analysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd
NVD description
Graylog is a free and open log management platform. Starting with 6.1, HTTP Inputs can be configured to check if a specified header is present and has a specified value to authenticate HTTP-based ingestion. Unfortunately, even though in cases of a missing header or a wrong value the correct HTTP response (401) is returned, the message will be ingested nonetheless. To mitigate the vulnerability, disable http-based inputs and allow only authenticated pull-based inputs. This vulnerability is fixed in 6.1.9.
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