CVE-2018-17453: 
GitLab vulnerability analysis and mitigation

A security vulnerability (CVE-2018-17453) was discovered in GitLab Community and Enterprise Edition affecting versions before 11.1.7, 11.2.x before 11.2.4, and 11.3.x before 11.3.1. The vulnerability was related to the exposure of sensitive access-token data through Sentry logs via the GRPC::Unknown exception (NVD, GitLab Advisory).

The vulnerability has been assigned a CVSS v3.1 Base Score of 5.3 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. This indicates that the vulnerability can be exploited over the network, requires low attack complexity, needs no privileges or user interaction, has unchanged scope, and can impact confidentiality with no effect on integrity or availability (NVD).

The vulnerability could allow attackers to obtain sensitive access-token data from Sentry logs when GRPC::Unknown exceptions occur. This exposure of sensitive information could potentially lead to unauthorized access to system resources (GitLab Advisory).

GitLab has addressed this vulnerability in versions 11.1.7, 11.2.4, and 11.3.1 of both Community and Enterprise Editions. Users are strongly recommended to upgrade to these patched versions immediately to mitigate the risk (GitLab Advisory).