CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-38189
Critical (9.8) in lettre lettre. EPSS 1.5% chance of exploitation in the next 30 days. Fixed in lettre 0.10.0-rc.3, 0.9.6.
An issue was discovered in the lettre crate before 0.9.6 for Rust. In an e-mail message body, an attacker can place a . character after two <CR><LF> sequences and then inject arbitrary SMTP commands.
Severity
- EPSS
- 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
- CWE
- CWE-77
- Published
- Modified
- Record from
- the NVD, synced
Affected
- lettre:lettre
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-qc36-q22q-cjw3 | crates.io | lettre | >=0.7.0 <0.9.6 | 0.9.6 |
| RUSTSEC-2021-0069 | crates.io | lettre | >=0.7.0 <0.9.6 >=0.10.0-alpha.1 <0.10.0-rc.3 | 0.9.6, 0.10.0-rc.3 |