Security readout for executives and security teams
Plain-English summary
CVE-2021-23414 is an XSS flaw in video.js before 7.14.3. A track tag src value could bypass HTML escaping and run arbitrary browser code. Business risk is highest for public sites or apps that render untrusted video or caption metadata through video.js.
Executive priority
Treat as a moderate web application risk. Patch during the normal remediation cycle, but accelerate if video playback or caption metadata is public, user-controlled, or embedded in authenticated business workflows.
Technical view
The source bundle describes improper escaping around the track element src attribute in video.js. A vulnerable version can allow script execution in the browser context of the hosting application. Snyk also tracks related WebJars NPM and Bower packages, so Java builds may inherit exposure through packaged video.js assets.
Likely exposure
Exposure is likely where applications include video.js before 7.14.3, including bundled frontend assets or WebJars packages, and render track data influenced by users or external content feeds.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVSS vector is network-reachable, low complexity, no privileges, with low confidentiality and integrity impact and no availability impact.
Researcher notes
Evidence identifies the affected package and fixed threshold but does not include detailed exploit conditions beyond the track src escaping issue. Validate dependency paths carefully because exposure may come from direct JavaScript use or Java WebJars packaging.
Mitigation direction
- Upgrade video.js to 7.14.3 or later.
- Update affected WebJars NPM or Bower package dependencies.
- Review vendor advisories for distribution-specific package updates.
- Prioritize public apps accepting user-supplied media or captions.
Validation and detection
- Inventory package manifests and lockfiles for video.js versions before 7.14.3.
- Check Java dependencies for org.webjars NPM or Bower video.js packages.
- Confirm deployed frontend bundles no longer contain vulnerable video.js assets.
- Review routes that render track tags from external or user-controlled data.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-23414 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N3.92.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://snyk.io/vuln/SNYK-JS-VIDEOJS-1533429CVE reference
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1533587CVE reference
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1533588CVE reference
- https://github.com/videojs/video.js/commit/b3acf663641fca0f7a966525a72845af7ec5fab2CVE reference
- FEDORA-2022-f7fdcb1820CVE reference · vendor-advisory
- FEDORA-2022-cb7084ae1cCVE reference · vendor-advisory
- FEDORA-2022-74a9c8e95fCVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.