{"cve":"CVE-2023-27582","nvd":{"published":"2023-03-13T22:15:12.387","modified":"2026-06-17T05:45:31.000","status":"Modified","description":"maddy is a composable, all-in-one mail server. Starting with version 0.2.0 and prior to version 0.6.3, maddy allows a full authentication bypass if SASL authorization username is specified when using the PLAIN authentication mechanisms. Instead of validating the specified username, it is accepted as is after checking the credentials for the authentication username. maddy 0.6.3 includes the fix for the bug. There are no known workarounds.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287","CWE-305"],"references":["https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399a","https://github.com/foxcpp/maddy/commit/9f58cb64b39cdc01928ec463bdb198c4c2313a9c","https://github.com/foxcpp/maddy/releases/tag/v0.6.3","https://github.com/foxcpp/maddy/security/advisories/GHSA-4g76-w3xw-2x6w","https://github.com/foxcpp/maddy/commit/55a91a37b71210f34f98f4d327c30308fe24399a"],"products":["maddy_project:maddy"],"source":"nvd","synced_at":"2026-10-19T21:37:41.955480748+00:00"},"epss":{"cve":"CVE-2023-27582","score":0.01019,"percentile":0.63387,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4g76-w3xw-2x6w","url":"https://osv.dev/vulnerability/GHSA-4g76-w3xw-2x6w","summary":"Full authentication bypass if SASL authorization username is specified","modified":"2026-09-10T03:49:52.395242124Z","packages":[{"ecosystem":"Go","name":"github.com/foxcpp/maddy","purl":"pkg:golang/github.com/foxcpp/maddy","ranges":[">=0.2.0 <0.6.3"],"fixed":["0.6.3"]}]},{"id":"GO-2023-1630","url":"https://osv.dev/vulnerability/GO-2023-1630","summary":"Full authentication bypass if SASL authorization username is specified in github.com/foxcpp/maddy","modified":"2026-03-03T04:51:24.133369Z","packages":[{"ecosystem":"Go","name":"github.com/foxcpp/maddy","purl":"pkg:golang/github.com/foxcpp/maddy","ranges":[">=0.2.0 <0.6.3"],"fixed":["0.6.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}