CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2023-27582
Critical (9.8) in maddy project maddy. EPSS 1.0% chance of exploitation in the next 30 days. Fixed in github.com/foxcpp/maddy 0.6.3.
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.
Severity
- EPSS
- 1.0% chance of exploitation in the next 30 days; higher than 63% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-287, CWE-305
- Published
- Modified
- Record from
- the NVD, synced
Affected
- maddy_project:maddy
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4g76-w3xw-2x6w | Go | github.com/foxcpp/maddy | >=0.2.0 <0.6.3 | 0.6.3 |
| GO-2023-1630 | Go | github.com/foxcpp/maddy | >=0.2.0 <0.6.3 | 0.6.3 |
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