CVE-2021-23414: This affects the package video.js before 7.14.3

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MEDIUM 6.5REMOTEUPGRADEMITIGATE

CVE-2021-23414 is a medium-severity flaw (CVSS 6.5) affecting video.js, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects the package video.js before 7.14.3. The src attribute of track tag allows to bypass HTML escaping and execute arbitrary code.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-07-28
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: fedoraproject · videojs

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

Am I affected?

Timeline

2021-07-28 08:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

videojs video.js UPGRADE

Affected: < 7.14.3

Fixed in: 7.14.3

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls video.js

2. UPGRADE to 7.14.3

npm install video.js@">=7.14.3"

fedoraproject fedora MITIGATE

Affected: 35 · 36 · 37

Fixed in: no fixed release known

Safe to downgrade to: a release before 35

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2021-23414?

video.js: upgrade to 7.14.3; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-23414 being exploited?

CVE-2021-23414 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-2021-23414 affect?

CVE-2021-23414 affects video.js, fedora. Severity is medium (CVSS 6.5). This affects the package video.js before 7.14.3. The src attribute of track tag allows to bypass HTML escaping and execute arbitrary code.

How urgent is CVE-2021-23414?

Priority 54/100. Public exploit reference; Remotely exploitable, no login, no user action

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References

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