CVE-2020-24392Public exploitNetwork attack vector

Trusted-data injection via missing TLS hostname validation

Published Feb 19, 2021 · Updated Aug 4, 2024

TLS hostname validation failure in voloko twitter-stream 0.1.10 and 0.1.16 allows man-in-the-middle attackers to inject data via interception. The library configures EventMachine TLS without checking that the server certificate matches stream.twitter.com, so a TLS endpoint with a mismatched certificate is accepted. Man-in-the-middle attackers must redirect the client's connection to a controlled TLS endpoint; successful interception exposes authentication material and inserts malicious stream data into trusted processing.

CVSS severity5.9
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TLS hostname validation failure in voloko twitter-stream 0.1.10 and 0.1.16 allows man-in-the-middle attackers to inject data via interception. The library configures EventMachine TLS without checking that the server certificate matches stream.twitter.com, so a TLS endpoint with a mismatched certificate is accepted. Man-in-the-middle attackers must redirect the client's connection to a controlled TLS endpoint; successful interception exposes authentication material and inserts malicious stream data into trusted processing.

The record

CVE
CVE-2020-24392
Published
Feb 19, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-297, CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-297Improper Validation of Certificate with Host Mismatch
CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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