CVE-2020-13482
Improper Certificate Validation in EM-HTTP-Request
EM-HTTP-Request 1.1.5 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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
EM-HTTP-Request 1.1.5 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.
- Record
CVE-2020-13482- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 5.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
EM-HTTP-Request 1.1.5 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.
- Record
CVE-2020-13482- Updated
- 2026-11-02
EUVDEUVD-2021-1157 No score
EM-HTTP-Request 1.1.5 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.
- Record
EUVD-2021-1157- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q27f-v3r6-9v77
Improper Certificate Validation in EM-HTTP-Request
EM-HTTP-Request 1.1.5 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.
- Record
GHSA-q27f-v3r6-9v77- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
OSV
EM-HTTP-Request 1.1.5 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.
- Record
CVE-2020-13482- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-q27f-v3r6-9v77
Improper Certificate Validation in EM-HTTP-Request
EM-HTTP-Request 1.1.5 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.
- Record
GHSA-q27f-v3r6-9v77- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
OSVRHSA-2021:0937
Red Hat Security Advisory: rubygem-em-http-request security update
- Record
RHSA-2021:0937- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVMGASA-2021-0172 No score
Updated ruby-em-http-request packages fix security vulnerability
Updated ruby-em-http-request packages fix security vulnerability:
A flaw was found in rubygem-em-http-request. The eventmachine library does not verify the hostname in a TLS server certificate which can allow an attacker to perform a man-in-the-middle attack. The highest threat from this vulnerability is to data confidentiality and integrity (CVE-2020-13482).
- Record
MGASA-2021-0172- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
em-http-requestRubyGems |
through 1.1.5 | 1.1.6 |
em-http-requestRubyGems |
before 1.1.6, plus listed versions 0.2.00.2.10.2.100.2.110.2.12 Show 25 moreShow less0.2.130.2.140.2.150.2.20.2.30.2.40.2.50.2.60.2.70.2.90.3.01.0.01.0.0.beta.11.0.0.beta.21.0.0.beta.31.0.0.beta.41.0.11.0.21.0.31.1.01.1.11.1.21.1.31.1.41.1.5 |
1.1.6 |
ruby-em-http-requestMageia:7 |
before 1.1.7-1.mga7 | 1.1.7-1.mga7 |
rubygem-em-http-requestRed Hat:openstack-optools:13::el7 |
before 0:1.1.5-4.el7ost | 0:1.1.5-4.el7ost |
rubygem-em-http-request-debuginfoRed Hat:openstack-optools:13::el7 |
before 0:1.1.5-4.el7ost | 0:1.1.5-4.el7ost |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-13482 is a high vulnerability (CVSS 7.4) in Em-http-request Project Em-http-request, published May 25, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.93%, the 60th percentile. Fixed in em-http-request 1.1.6.
References
github.com/igrigorik/em-http-request/issues/339
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MKYP5TR5NTVVDX5R4HCNNH2OQR7M4X3J
securitylab.github.com/advisories/GHSL-2020-094-igrigorik-em-http-request
nvd.nist.gov/vuln/detail/CVE-2020-13482
Show 14 moreShow less
advisories.mageia.org/MGASA-2021-0172.html
bugs.mageia.org/show_bug.cgi?id=27976
access.redhat.com/errata/RHSA-2021:0937
bugzilla.redhat.com/show_bug.cgi?id=1911457
security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_0937.json
cve.org/CVERecord?id=CVE-2020-13482