MediaElement.js – HTML5 Video & Audio Player <= 4.2.8 - Contributor+ Stored XSS via Shortcode
Priority MEDIUM 58CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
The MediaElement.js WordPress plugin through 4.2.8 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high-privilege users such as admins.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00534 45th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | MediaElement.js | up to 4.2.8 | — | No fix listed | CNA |
- MediaElement.js VendorUnknown Affected up to 4.2.8 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediaelementjs:mediaelement.js:*:*:*:*:*:wordpress:*:* | up to 4.2.8 | Vulnerable | Mediaelementjs |
- cpe:2.3:a:mediaelementjs:mediaelement.js:*:*:*:*:*:wordpress:*:* Versions up to 4.2.8 Vulnerable ·Mediaelementjs
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-4699
- 2026-10-03 Alias added: GHSA-9p3x-2jg3-7xrp
References
More Mediaelementjs Mediaelement.js vulnerabilities
- TI-2016-03932 Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.as in MediaElement.js… CVSS 3.0MEDIUM 6.1
- TI-2013-01742 Cross-site scripting (XSS) vulnerability in flashmediaelement.swf in MediaElement.js… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2022-4699 · CVE Program
- CVE-2022-4699 · NVD
- FIRST EPSS
- GHSA-9p3x-2jg3-7xrp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences