{"id":"CVE-2021-20331","aliases":["EUVD-2022-4730","GHSA-p9rv-qgqw-jx2w"],"status":"published","title":"MongoDB C# Driver may publish events containing authentication-related data to a command listener configured by an application","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver v2.12 versions prior to and including 2.12.1.","severity":{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00623,"percentile":0.50164,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2021-05-13T07:40:11Z","modified":"2026-10-24T10:30:39Z","fixes":[{"ecosystem":"NuGet","package":"mongodb.driver","fixed_in":["2.12.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"mongodb.driver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.11.0"},{"fixed":"2.12.2"}]}]},{"source":"osv","ecosystem":"NuGet","package":"mongodb.driver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.11.0"},{"fixed":"2.12.2"}]}],"versions":["2.11.0","2.11.1","2.11.2","2.11.3","2.11.4","2.11.5","2.11.6","2.12.0","2.12.0-beta1","2.12.1"]}],"products":[{"vendor":"mongodb","product":"c\\#_driver"},{"vendor":"mongodb inc.","product":"mongodb c# driver"}],"references":[{"url":"https://jira.mongodb.org/browse/CSHARP-3521","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","Vendor Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20331","tags":["advisory"]},{"url":"https://github.com/mongodb/mongo-csharp-driver/commit/1f1a526e93ed7aa254759704b19f5ee66a3af365","tags":["web"]},{"url":"https://github.com/advisories/GHSA-p9rv-qgqw-jx2w"}],"sources":{"cve":[{"id":"CVE-2021-20331","title":"MongoDB C# Driver may publish events containing authentication-related data to a command listener configured by an application","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver v2.12 versions prior to and including 2.12.1.","status":"published","published":"2021-05-13T07:40:11.801Z","modified":"2024-09-16T22:25:28.232Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2022-4730","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver v2.12 versions prior to and including 2.12.1.","status":"published","published":"2021-05-13T07:40:11Z","modified":"2024-09-16T22:25:28Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T00:55:02.946444Z"}],"ghsa":[{"id":"GHSA-p9rv-qgqw-jx2w","title":"MongoDB C# Driver Risk of Exposing Authentication Data via Command Listener","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver 2.12 \u003c= 2.12.1.","status":"published","published":"2022-05-24T19:02:24Z","modified":"2024-01-23T18:44:24Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:37:32.302254Z"}],"nvd":[{"id":"CVE-2021-20331","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver v2.12 versions prior to and including 2.12.1.","status":"published","published":"2021-05-13T08:15:06.557Z","modified":"2026-06-17T03:33:41.333Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:06:53.343329Z"}],"osv":[{"id":"CVE-2021-20331","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver v2.12 versions prior to and including 2.12.1.","status":"published","published":"2021-05-13T08:15:06.557Z","modified":"2026-10-24T10:30:39.324774875Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:18.004149Z"},{"id":"GHSA-p9rv-qgqw-jx2w","title":"MongoDB C# Driver Risk of Exposing Authentication Data via Command Listener","description":"Specific versions of the MongoDB C# Driver may erroneously publish events containing authentication-related data to a command listener configured by an application. The published events may contain security-sensitive data when commands such as \"saslStart\", \"saslContinue\", \"isMaster\", \"createUser\", and \"updateUser\" are executed. Without due care, an application may inadvertently expose this authenticated-related information, e.g., by writing it to a log file. This issue only arises if an application enables the command listener feature (this is not enabled by default). This issue affects the MongoDB C# Driver 2.12 \u003c= 2.12.1.","status":"published","published":"2022-05-24T19:02:24Z","modified":"2024-02-16T08:03:22.491236Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:46:52.891208Z"}]}}