CVE-2025-30373: Graylog2 server Graylog's Authenticated HTTP Inputs Ingest Vulnerability

MODERATE
Advisory Identifier: GHSA-q7g5-jq6p-6wvx
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CVSS 6.5
CWE-285
Published
Advisory Summary

CVE-2025-30373 is a MODERATE (CVSS 6.5) graylog's authenticated http inputs ingest vulnerability (CWE-285: Improper Authorization) affecting Graylog2 server libraries in the Maven ecosystem. The issue involves graylog's authenticated http inputs ingest message even if authorization header is missing or has wrong value. Remediation is available by upgrading affected packages to version 6.1.9.

CVE-2025-30373 at a Glance

CVE Identifier CVE-2025-30373
GHSA Identifier GHSA-q7g5-jq6p-6wvx
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-285: Improper Authorization
Affected Product Graylog2 server
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2025-30373

To remediate this vulnerability, upgrade all affected Graylog2 server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.graylog2:graylog2-server fixed: 6.1.9 
<dependency>
    <groupId>org.graylog2</groupId>
    <artifactId>graylog2-server</artifactId>
    <version>6.1.9</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.graylog2

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2025-30373, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.graylog2

Analyze the terminal output to locate any version of Graylog2 server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.1.9), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.graylog2 command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. In Graylog2 server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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

CVE-2025-30373 Affected Graylog2 server Versions

1 component(s)
Fixed Versions:
6.1.9
Product / Package Ecosystem Affected Versions Fixed Version
org.graylog2:graylog2-server
maven/org.graylog2/graylog2-server
Maven
≥ 6.1.0
< 6.1.9
6.1.9

References

GitHub Advisory / Wiki ADVISORY
https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-q7g5-jq6p-6wvx
NVD — CVE-2025-30373 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-30373
Security Fix Commit FIX COMMIT
https://github.com/Graylog2/graylog2-server/commit/31bc13d3cd6f550ec83473d0f8666cd3ebf50f10
Graylog2 server Source Repository REPOSITORY
https://github.com/Graylog2/graylog2-server

Frequently Asked Questions

What is CVE-2025-30373?
CVE-2025-30373 is a security vulnerability in Graylog2 server involving Graylog's Authenticated HTTP inputs ingest message even if Authorization header is missing or has wrong value under CWE-285: Improper Authorization.
Which Graylog2 server versions are affected?
Affected versions include releases prior to 6.1.9 across affected packages: org.graylog2:graylog2-server.
What version fixes CVE-2025-30373?
Upgrading to 6.1.9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is graylog2-server affected?
Yes, org.graylog2:graylog2-server is affected in releases prior to 6.1.9. Upgrade your dependency to 6.1.9 or later.
What is the CVSS score of CVE-2025-30373?
CVE-2025-30373 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
What CWE is associated with CVE-2025-30373?
CVE-2025-30373 is classified under CWE-285: Improper Authorization (The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2025-30373?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.graylog2'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q7g5-jq6p-6wvx",
  "modified" : "2025-05-07T15:03:32Z",
  "published" : "2025-04-07T16:37:52Z",
  "aliases" : [ "CVE-2025-30373" ],
  "summary" : "Graylog's Authenticated HTTP inputs ingest message even if Authorization header is missing or has wrong value",
  "details" : "### Impact\nStarting 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.\n\n### Patches\n\n### Workarounds\nDisabling http-based inputs and allow only authenticated pull-based inputs.\n\nAnalysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.graylog2:graylog2-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.1.0"
      }, {
        "fixed" : "6.1.9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-q7g5-jq6p-6wvx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-30373"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Graylog2/graylog2-server/commit/31bc13d3cd6f550ec83473d0f8666cd3ebf50f10"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Graylog2/graylog2-server"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-04-07T16:37:52Z",
    "nvd_published_at" : "2025-04-07T15:15:43Z"
  }
}