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No exploitation reportedFix available

CVE-2020-28247

No exploitation reported by the sources we read.

  • Published2020-11-12

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The lettre library through 0.10.0-alpha for Rust allows arbitrary sendmail option injection via transport/sendmail/mod.rs.

Timeline

dates in UTC
  1. 2020-11-1218:15CVE publishedNVD

Versions per branch

NVD · OSV
Lettre
BranchAffectedFixed in
0.8≥ 0.8.0, ≤ 0.8.3no fix published
0.9≥ 0.9.0, ≤ 0.9.5no fix published
0.7= 0.7.0no fix published
0.10= 0.10.0no fix published
lettre
BranchAffectedFixed in
0.10≥ 0.10.0-alpha.1, < 0.10.0-alpha.40.10.0-alpha.4
0.9≥ 0.9.0, < 0.9.50.9.5
0.8≥ 0.8.0, < 0.8.40.8.4
0.7≥ 0.7.0, < 0.7.10.7.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Published
2020-11-12
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-vc2p-r46x-m3vx

Frequently asked questions

What is CVE-2020-28247?

The lettre library through 0.10.0-alpha for Rust allows arbitrary sendmail option injection via transport/sendmail/mod.rs.

Is CVE-2020-28247 actively exploited?

Active exploitation of CVE-2020-28247 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-28247?

CVE-2020-28247 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

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