CVE-2023-2620 - CVE House
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Status published Medium CVE-2023-2620

Insertion of Sensitive Information Into Sent Data in GitLab

Vulnerability Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 15.1 prior to 15.11.10, all versions from 16.0 prior to 16.0.6, all versions from 16.1 prior to 16.1.1. A maintainer could modify a webhook URL to leak masked webhook secrets by manipulating other masked portions. This addresses an incomplete fix for CVE-2023-0838.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Thanks [theluci](https://hackerone.com/theluci) for reporting this vulnerability through our HackerOne bug bounty program

References

More from GitLab

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CVE-2025-9825
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CVE-2025-9642
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
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CVE-2025-9484
Missing Authorization in GitLab
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Affected Vendor

Affected Software

GitLab
Vulnerable Versions:
15.1, 16.0, 16.1

Timeline

Official Publish: July 13th, 2023
Last Modified: November 6th, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-201

MITRE ATT&CK TTPs

T1041 Exfiltration Over C2 Channel
Exfiltration
T1040 Network Sniffing
Credential Access
T1557 Adversary-in-the-Middle
Collection
T1552 Unsecured Credentials
Credential Access
T1078 Valid Accounts
Persistence