How severe is CVE-2025-30373?

CVE-2025-30373 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2025-30373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30373?

CVE-2025-30373 affects Graylog. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-30373?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-30373 have an EU (EUVD) identifier?

Yes. CVE-2025-30373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10045.

When was CVE-2025-30373 published?

CVE-2025-30373 was published on 2025-04-07 and last updated on 2026-06-17.

CVE-2025-30373

CVE-2025-30373 is a medium-severity vulnerability in Graylog with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-10045
Weakness: CWE-285
Affected product: Graylog
Published: 2025-04-07
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-30373?: CVE-2025-30373 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2025-30373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30373?: CVE-2025-30373 affects Graylog. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-30373?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-30373 have an EU (EUVD) identifier?: Yes. CVE-2025-30373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10045.
When was CVE-2025-30373 published?: CVE-2025-30373 was published on 2025-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:graylog:graylog:*:*:*:*:*:*:*:*

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