CVE-2025-2934
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Vulnerability report for CVE-2025-2934, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2025-10-09

Last updated on: 2025-10-20

Assigner: GitLab Inc.

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 5.2 prior to 18.2.8, 18.3 prior to 18.3.4, and 18.4 prior to 18.4.2 that could have allowed an authenticated attacker to create a denial of service condition by configuring malicious webhook endpoints that send crafted HTTP responses.

CVSS Scores

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Meta Information

Published
2025-10-09
Last Modified
2025-10-20
Generated
2026-07-06
AI Q&A
2025-10-09
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
gitlab gitlab From 5.2.0 (inc) to 18.2.8 (exc)
gitlab gitlab From 5.2.0 (inc) to 18.2.8 (exc)
gitlab gitlab From 18.3.0 (inc) to 18.3.4 (exc)
gitlab gitlab From 18.3.0 (inc) to 18.3.4 (exc)
gitlab gitlab From 18.4.0 (inc) to 18.4.2 (exc)
gitlab gitlab From 18.4.0 (inc) to 18.4.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

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Executive Summary

This vulnerability in GitLab CE/EE allows an authenticated attacker to create a denial of service (DoS) condition by configuring malicious webhook endpoints that send crafted HTTP responses. It affects all versions from 5.2 prior to 18.2.8, 18.3 prior to 18.3.4, and 18.4 prior to 18.4.2.

Impact Analysis

The vulnerability can impact you by causing a denial of service condition in your GitLab instance, potentially disrupting normal operations and availability of the service due to malicious webhook configurations.

Mitigation Strategies

To mitigate this vulnerability, immediately upgrade GitLab CE/EE to versions 18.2.8, 18.3.4, 18.4.2 or later. Avoid using or configuring webhook endpoints that are untrusted or potentially malicious until the upgrade is applied.

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