{"id":"CVE-2023-35391","state":"PUBLISHED","title":"ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability","description":"ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability","publishedAt":"2023-08-08T18:52:30.105Z","updatedAt":"2026-08-10T15:11:59.301Z","severity":{"score":6.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft .NET 6.0","Microsoft .NET 7.0","Microsoft ASP.NET Core 2.1","Microsoft Microsoft Visual Studio 2022 version 17.2","Microsoft Microsoft Visual Studio 2022 version 17.4","Microsoft Microsoft Visual Studio 2022 version 17.6"],"affected":[{"vendor":"Microsoft","product":".NET 6.0","versions":[{"version":"6.0.0","status":"affected","lessThan":"6.0.21","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 7.0","versions":[{"version":"7.0.0","status":"affected","lessThan":"7.0.10","versionType":"custom"}]},{"vendor":"Microsoft","product":"ASP.NET Core 2.1","versions":[{"version":"2.0","status":"affected","lessThan":"2.1.40","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.2","versions":[{"version":"17.2.0","status":"affected","lessThan":"17.2.18","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.4","versions":[{"version":"17.4.0","status":"affected","lessThan":"17.4.10","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.6","versions":[{"version":"17.6.0","status":"affected","lessThan":"17.6.6","versionType":"custom"}]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:00.499Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/35xxx/CVE-2023-35391.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-35391","state":"PUBLISHED","datePublished":"2023-08-08T18:52:30.105Z","dateUpdated":"2026-08-10T15:11:59.301Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2023-06-14T23:09:47.640Z"},"containers":{"cna":{"title":"ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability","descriptions":[{"lang":"en-US","value":"ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability"}],"affected":[{"vendor":"Microsoft","product":".NET 6.0","versions":[{"version":"6.0.0","status":"affected","lessThan":"6.0.21","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 7.0","versions":[{"version":"7.0.0","status":"affected","lessThan":"7.0.10","versionType":"custom"}]},{"vendor":"Microsoft","product":"ASP.NET Core 2.1","versions":[{"version":"2.0","status":"affected","lessThan":"2.1.40","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.2","versions":[{"version":"17.2.0","status":"affected","lessThan":"17.2.18","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.4","versions":[{"version":"17.4.0","status":"affected","lessThan":"17.4.10","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.6","versions":[{"version":"17.6.0","status":"affected","lessThan":"17.6.6","versionType":"custom"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391","name":"ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"MEDIUM","baseScore":6.2,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"description":"Information Disclosure","lang":"en-US","type":"Impact"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-08-10T15:11:59.301Z"},"datePublic":"2023-08-08T07:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.2.0","versionEndExcluding":"17.2.18"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.4.0","versionEndExcluding":"17.4.10"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.6.0","versionEndExcluding":"17.6.6"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*","versionStartIncluding":"2.0","versionEndExcluding":"2.1.40"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.0","versionEndExcluding":"6.0.21"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.0","versionEndExcluding":"7.0.10"}]}]}]},"adp":[{"title":"CVE Program Container","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35391","name":"ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability","tags":["vendor-advisory","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T16:23:59.717Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-11T18:55:14.681715Z","id":"CVE-2023-35391","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T18:57:48.798Z"}}]}}}