CVE-2025-12697: GitLab Information Disclosure Vulnerability

CVE-2025-12697 Overview

A sensitive information disclosure vulnerability has been identified in GitLab CE/EE that allows an authenticated user with maintainer-role permissions to reveal Datadog API credentials under certain conditions. This vulnerability affects GitLab installations across a wide range of versions, from 15.5 through multiple major releases up to 18.9.2.

Critical Impact

Authenticated maintainers can access Datadog API credentials, potentially enabling unauthorized access to monitoring data and infrastructure visibility.

Affected Products

• GitLab CE/EE versions 15.5 before 18.7.6
• GitLab CE/EE versions 18.8 before 18.8.6
• GitLab CE/EE versions 18.9 before 18.9.2

Discovery Timeline

• 2026-03-11 - CVE-2025-12697 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2025-12697

Vulnerability Analysis

This vulnerability is classified under CWE-116 (Improper Encoding or Escaping of Output), indicating that the application fails to properly handle output encoding, resulting in unintended exposure of sensitive credential data. The flaw exists within GitLab's handling of Datadog integration configurations, where maintainer-level users can leverage their permissions to extract API credentials that should remain protected.

The vulnerability requires network access and high privileges (maintainer role) to exploit, with high attack complexity due to the specific conditions required for successful exploitation. While the confidentiality impact is limited, the exposure of third-party API credentials could enable attackers to access monitoring infrastructure, view sensitive application metrics, or potentially manipulate monitoring configurations in connected Datadog accounts.

Root Cause

The root cause stems from improper encoding or escaping of output (CWE-116) in GitLab's Datadog integration handling. When certain conditions are met, the application fails to properly sanitize or mask Datadog API credentials before rendering them to users with maintainer permissions. This improper output handling allows credential values that should be masked or excluded from responses to be exposed to authenticated users.

Attack Vector

The attack vector is network-based, requiring an authenticated attacker with maintainer-level permissions within a GitLab project or group. The attacker must interact with the Datadog integration settings or related API endpoints under specific conditions to trigger the credential disclosure. Due to the high attack complexity, exploitation requires knowledge of the specific vulnerable functionality and timing conditions.

The vulnerability does not require user interaction beyond the attacker's own authenticated session. While the scope is unchanged (the vulnerability does not impact resources beyond its security context), successful exploitation compromises the confidentiality of Datadog API credentials which could be leveraged for lateral movement into monitoring infrastructure.

Detection Methods for CVE-2025-12697

Indicators of Compromise

• Unusual access patterns to Datadog integration settings by maintainer accounts
• API requests to endpoints related to integration configurations with anomalous response sizes
• Audit log entries showing repeated access to project integration settings
• Unexpected Datadog API authentication attempts from non-GitLab IP addresses

Detection Strategies

• Monitor GitLab audit logs for unusual access to integration configuration endpoints
• Implement alerting on Datadog API key usage from unexpected sources or IP ranges
• Review access logs for maintainer accounts accessing integration settings without legitimate business need
• Configure SIEM rules to correlate GitLab integration access with subsequent Datadog API activity

Monitoring Recommendations

• Enable comprehensive audit logging for all integration configuration access in GitLab
• Implement Datadog API key rotation monitoring and alerting for any unauthorized usage patterns
• Deploy endpoint monitoring on GitLab servers to detect unusual response payloads containing credential patterns
• Establish baseline behavior for maintainer access to integration settings and alert on deviations

How to Mitigate CVE-2025-12697

Immediate Actions Required

• Upgrade GitLab CE/EE to versions 18.7.6, 18.8.6, or 18.9.2 or later immediately
• Rotate all Datadog API credentials configured in GitLab integrations
• Review audit logs for any suspicious access to integration settings by maintainer accounts
• Temporarily restrict maintainer permissions if upgrade cannot be performed immediately

Patch Information

GitLab has released security patches addressing this vulnerability. Organizations should upgrade to the following fixed versions:

• GitLab 18.7.x users: Upgrade to version 18.7.6 or later
• GitLab 18.8.x users: Upgrade to version 18.8.6 or later
• GitLab 18.9.x users: Upgrade to version 18.9.2 or later

For detailed patch information, refer to the GitLab Patch Release Notes and the GitLab Work Item #579504. The vulnerability was originally reported via HackerOne Report #3341953.

Workarounds

• Temporarily disable Datadog integration until patches can be applied
• Implement strict network segmentation limiting access to GitLab administration interfaces
• Reduce the number of users with maintainer-level permissions to minimize attack surface
• Configure Datadog API keys with minimum required permissions and implement IP restrictions where possible
• Enable additional monitoring on Datadog API access patterns to detect potential credential misuse