Improper Certificate Validation in twitter-stream

published 2021-02-19 5y ago modified 2026-06-17 4mo ago also GHSA-p6p8-q4pj-f74m , EUVD-2021-0687

cvss: 5.9; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

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).

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Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

securitylab.github.com https://securitylab.github.com/advisories/GHSL-2020-097-voloko-twitter-stream referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N
GitHub	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
rubygems	twitter-stream	<=0.1.16	no fix listed

Classification

Weakness

CWE-295 Improper Certificate Validation

References

securitylab.github.com /advisories/GHSL-2020-097-voloko-twitter-stream
advisory, exploit, third-party-advisory
github.com /voloko/twitter-stream
web, product
nvd.nist.gov /vuln/detail/CVE-2020-24392
advisory

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.