CVE-2025-30373: graylog Access Control Flaw — Fix

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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CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-285 CWE-285

Affected Products

Vendor	Product	Versions
graylog	graylog	6.1.0 — 6.1.9

References

Advisories & Patches

https://github.com/Graylog2/graylog2-server/commit/31bc13d3cd6f550ec83473d0f8666cd3ebf50f10

Other References

https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-q7g5-jq6p-6wvx

Frequently Asked Questions

What is CVE-2025-30373? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-30373? +

CVE-2025-30373 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-30373? +

CVE-2025-30373 affects products from graylog, specifically: graylog. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-30373? +

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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