CVE-2023-1710 in GitLab
Summary
by MITRE • 04/06/2023
A sensitive information disclosure vulnerability in GitLab affecting all versions from 15.0 prior to 15.8.5, 15.9 prior to 15.9.4 and 15.10 prior to 15.10.1 allows an attacker to view the count of internal notes for a given issue.
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Analysis
by VulDB Data Team • 08/12/2025
This vulnerability represents a sensitive information disclosure flaw in GitLab's issue tracking system that exposes internal metadata to unauthorized users. The vulnerability specifically affects versions prior to the mentioned patched releases, creating a window where attackers could potentially gather intelligence about project activities and internal communications. The flaw allows an attacker to determine the number of internal notes associated with a particular issue, which could reveal information about the issue's complexity, the number of team members involved, or the depth of internal discussions. This type of information leakage, while seemingly minor, can provide valuable reconnaissance data for threat actors planning more sophisticated attacks against the organization's development infrastructure.
The technical implementation of this vulnerability stems from insufficient access controls within GitLab's API endpoints that handle issue metadata. When an authenticated user makes a request to retrieve issue details, the system inadvertently includes the count of internal notes in the response payload. This occurs because the application does not properly validate whether the requesting user has appropriate permissions to view such internal tracking information. The vulnerability aligns with CWE-200, which describes improper exposure of sensitive information, and demonstrates how access control mechanisms can be bypassed to reveal information that should remain restricted to authorized personnel only.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable more targeted attacks against development teams. An attacker who discovers the internal note count for an issue may infer the level of complexity or sensitivity surrounding that particular task, potentially guiding their approach to exploitation or social engineering attempts. For example, a high internal note count might indicate a complex security issue or a bug that requires extensive discussion, suggesting that the vulnerability could be more critical than initially apparent. This information can also be used to identify active development projects or team workflows, providing attackers with valuable context for targeting specific development environments or personnel.
Organizations should implement immediate mitigations including updating to the patched versions mentioned in the advisory, specifically versions 15.8.5, 15.9.4, and 15.10.1. Additionally, administrators should review access controls and permissions within their GitLab instances to ensure that internal note visibility is properly restricted to authorized team members only. The vulnerability demonstrates the importance of comprehensive access control validation in web applications, particularly in collaborative development platforms where internal communications are frequently exposed through API endpoints. Security teams should also consider implementing network-level monitoring to detect unusual API access patterns that might indicate exploitation attempts targeting this specific information disclosure vulnerability. This issue highlights the broader ATT&CK technique of credential access through reconnaissance activities, where attackers gather information about system internals to plan more effective attacks against development environments.