CVE-2020-24392: In voloko twitter-stream 0.1.10, missing TLS hostname validation allows an attacker to perform a man-in-the-mi

This week

MEDIUM 5.9REMOTEDOWNGRADE

CVE-2020-24392 is a medium-severity flaw (CVSS 5.9) affecting twitter-stream. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In voloko twitter-stream 0.1.10, missing TLS hostname validation allows an attacker to perform a man-in-the-middle attack against users of the library (because eventmachine is misused).

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-295
Published	2021-02-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: twitter-stream project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-02-19 23:15 UTCPublished CVE record published
2026-06-17 03:05 UTCUpdated Record last modified

twitter-stream project twitter-stream DOWNGRADE

Affected: 0.1.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.1.10

1. Check installed version

apt-cache policy twitter-stream || rpm -q twitter-stream || twitter-stream --version

2. No fixed release: DOWNGRADE to a release before 0.1.10 (Debian / Ubuntu)

apt-cache madison twitter-stream sudo apt install twitter-stream=<VERSION_BEFORE_0.1.10> sudo apt-mark hold twitter-stream

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list twitter-stream sudo dnf downgrade twitter-stream-<VERSION_BEFORE_0.1.10> sudo dnf versionlock add twitter-stream

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-24392?

twitter-stream: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-24392 being exploited?

CVE-2020-24392 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-24392 affect?

CVE-2020-24392 affects twitter-stream. Severity is medium (CVSS 5.9). In voloko twitter-stream 0.1.10, missing TLS hostname validation allows an attacker to perform a man-in-the-middle attack against users of the library (because eventmachine is misused).

How urgent is CVE-2020-24392?

Priority 45/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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