An issue was discovered in the POP3 component of Courier Mail Server before 1.1.5.
Priority LOW 38CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in the POP3 component of Courier Mail Server before 1.1.5. Meddler-in-the-middle attackers can pipeline commands after the POP3 STLS command, injecting plaintext commands into an encrypted user session.
Why it matters now
EPSS 0.01369 72nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:courier-mta:courier_mail_server:*:*:*:*:*:*:*:* | before 1.1.5 | Vulnerable | Courier-mta |
- cpe:2.3:a:courier-mta:courier_mail_server:*:*:*:*:*:*:*:* Versions before 1.1.5 Vulnerable ·Courier-mta
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-38084
- 2026-10-03 Alias added: GHSA-m7r5-gh9x-xg9m
References
Sources
- CVE-2021-38084 · CVE Program
- CVE-2021-38084 · NVD
- FIRST EPSS
- GHSA-m7r5-gh9x-xg9m · GitHub Advisory Database · CC BY 4.0
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