CVE-2021-38711: 
NixOS vulnerability analysis and mitigation

CVE-2021-38711 is a security vulnerability discovered in gitit versions before 0.15.0.0, where the Export feature could be exploited to leak information from files. The vulnerability was disclosed on August 16, 2021 (NVD).

The vulnerability has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. The vulnerability is classified under CWE-552 (Files or Directories Accessible to External Parties). The issue specifically relates to the Export feature in gitit, which contained multiple vectors that could be exploited to expose file contents (GitHub Commit).

The vulnerability allows remote attackers to access and leak information from files stored in the gitit system. The high CVSS score indicates significant potential for unauthorized information disclosure, though the vulnerability does not affect system integrity or availability (NVD).

The vulnerability was fixed in gitit version 0.15.0.0 by completely removing the Export feature. The developers determined that the feature posed a security risk due to multiple vectors through which file contents could be exposed. Users should upgrade to version 0.15.0.0 or later to mitigate this vulnerability (GitHub Release).