GitLab Community Edition/Enterprise Edition up to 18.4.5/18.5.3/18.6.1 Swagger UI cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in GitLab Community Edition and Enterprise Edition up to 18.4.5/18.5.3/18.6.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component Swagger UI. This manipulation causes cross site scripting. This vulnerability appears as CVE-2025-12029. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in GitLab Community Edition and Enterprise Edition up to 18.4.5/18.5.3/18.6.1. Affected by this vulnerability is an unknown part of the component Swagger UI. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.11 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have, under certain circumstances, allowed an unauthenticated user to perform unauthorized actions on behalf of another user by injecting malicious external scripts into the Swagger UI."

The weakness was presented by x0abcd_. It is possible to read the advisory at gitlab.com. This vulnerability is known as CVE-2025-12029 since 10/21/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 298834 (GitLab 15.11 < 18.4.6 / 18.5 < 18.5.4 / 18.6 < 18.6.2 (CVE-2025-12029)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.4.6, 18.5.4 or 18.6.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (298834), EUVD (EUVD-2025-202667) and CERT Bund (WID-SEC-2025-2822). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Open Source GitLab

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.0
CNA Vector (GitLab): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 298834
Nessus Name: GitLab 15.11 < 18.4.6 / 18.5 < 18.5.4 / 18.6 < 18.6.2 (CVE-2025-12029)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Community Edition/Enterprise Edition 18.4.6/18.5.4/18.6.2

Timelineinfo

10/21/2025 CVE reserved
12/11/2025 +51 days Advisory disclosed
12/11/2025 +0 days VulDB entry created
02/13/2026 +64 days VulDB entry last update

Sourcesinfo

Vendor: gitlab.com

Advisory: gitlab.com
Researcher: x0abcd_
Status: Confirmed

CVE: CVE-2025-12029 (🔒)
GCVE (CVE): GCVE-0-2025-12029
GCVE (VulDB): GCVE-100-335863
EUVD: 🔒
CERT Bund: WID-SEC-2025-2822 - GitLab: Mehrere Schwachstellen

Entryinfo

Created: 12/11/2025 09:26
Updated: 02/13/2026 14:52
Changes: 12/11/2025 09:26 (66), 12/11/2025 12:30 (1), 12/11/2025 14:50 (7), 02/13/2026 14:52 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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