CVE-2025-4225Public exploitNetwork attack vector

Unauthenticated service interruption via multiplexed GraphQL queries

Published Aug 27, 2025 · Updated Aug 27, 2025

Resource exhaustion in affected GitLab CE/EE releases allows remote attackers to interrupt service with crafted GraphQL requests. The GraphQL project.snippets resolver does not scale request-complexity limits with repeated selections, multiplying backend work across parallel requests. No authentication is required, but a public project with large public snippets must exist; sustained multiplexed requests can make the UI and API unresponsive for all users.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected GitLab CE/EE releases allows remote attackers to interrupt service with crafted GraphQL requests. The GraphQL project.snippets resolver does not scale request-complexity limits with repeated selections, multiplying backend work across parallel requests. No authentication is required, but a public project with large public snippets must exist; sustained multiplexed requests can make the UI and API unresponsive for all users.

The record

CVE
CVE-2025-4225
Published
Aug 27, 2025
Updated
Aug 27, 2025
Vendor
GitLab
Product
GitLab
Classifications
CWE-770, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14.1 <18.1.5
  2. Affected versionversion=18.2 <18.2.5
  3. Affected versionversion=18.3 <18.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GitLab · GitLabversion=14.1 <18.1.5; version=18.2 <18.2.5; version=18.3 <18.3.1

Published CVSS scores

5.3GitLabCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Endpoint Denial of Service: Service Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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