em-imap 0.5 uses the library eventmachine in an insecure way that allows an attacker to…
Priority LOW 34CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-295.
Summary
em-imap 0.5 uses the library eventmachine in an insecure way that allows an attacker to perform a man-in-the-middle attack against users of the library. The hostname in a TLS server certificate is not verified.
Why it matters now
EPSS 0.0077 55th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
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 |
| — | em-imap (RubyGems) | up to 0.5 | — | No fix listed | GHSA-4f68-49qq-h392 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- em-imap (RubyGems) Vendor— Affected up to 0.5 Fixed in — No fix listed GHSA-4f68-49qq-h392
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:em-imap_project:em-imap:0.5:*:*:*:*:*:*:* | 0.5 | Vulnerable | Em-imap Project |
- cpe:2.3:a:em-imap_project:em-imap:0.5:*:*:*:*:*:*:* Versions 0.5 Vulnerable ·Em-imap Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-13163
- 2026-10-03 Alias added: GHSA-4f68-49qq-h392
References
Sources
- CVE-2020-13163 · CVE Program
- CVE-2020-13163 · NVD
- FIRST EPSS
- GHSA-4f68-49qq-h392 · GitHub Advisory Database · CC BY 4.0
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