Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.as in MediaElement.js…
Priority LOW 37CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.as in MediaElement.js before 2.21.0, as used in WordPress before 4.5.2, allows remote attackers to inject arbitrary web script or HTML via an obfuscated form of the jsinitfunction parameter, as demonstrated by "jsinitfunctio%gn."
Why it matters now
EPSS 0.07351 94th percentileScored 2026-11-07
Fix Fixed mediaelement (npm): 2.11.1contao-components/mediaelement (Packagist): 2.21.1+1 more product
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | mediaelement (npm) | before 2.11.1 | 2.11.1 | Patch available | GHSA-277w-qpxr-2549 |
| — | contao-components/mediaelement (Packagist) | 2.14.2 to before 2.21.1 | 2.21.1 | Patch available | GHSA-277w-qpxr-2549 |
| — | contao/core (Packagist) | 3.0.0 to before 3.5.15 | 3.5.15 | Patch available | GHSA-277w-qpxr-2549 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- mediaelement (npm) Vendor— Affected before 2.11.1 Fixed in 2.11.1 Patch available GHSA-277w-qpxr-2549
- contao-components/mediaelement (Packagist) Vendor— Affected 2.14.2 to before 2.21.1 Fixed in 2.21.1 Patch available GHSA-277w-qpxr-2549
- contao/core (Packagist) Vendor— Affected 3.0.0 to before 3.5.15 Fixed in 3.5.15 Patch available GHSA-277w-qpxr-2549
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediaelementjs:mediaelement.js:*:*:*:*:*:*:*:* | up to 2.20.1 | Vulnerable | Mediaelementjs |
| cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* | up to 4.5.1 | Vulnerable | WordPress |
- cpe:2.3:a:mediaelementjs:mediaelement.js:*:*:*:*:*:*:*:* Versions up to 2.20.1 Vulnerable ·Mediaelementjs
- cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* Versions up to 4.5.1 Vulnerable ·WordPress
Remediation
- Fix · GHSA-277w-qpxr-2549 mediaelement (npm) Fixed in 2.11.1 Advisory →
- Fix · GHSA-277w-qpxr-2549 contao-components/mediaelement (Packagist) Fixed in 2.21.1 Advisory →
- Fix · GHSA-277w-qpxr-2549 contao/core (Packagist) Fixed in 3.5.15 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2016-4567
- 2026-10-03 Alias added: GHSA-277w-qpxr-2549
References
Patch 5
Advisory 3
Other 9
- [oss-security] 20160507 CVE Request: wordpress and mediaelement
- https://github.com/mediaelement/mediaelement/commit/34834eef8ac830b9145df169ec22016a4350f06e
- https://contao.org/en/news/contao-3_5_15.html
- https://github.com/FriendsOfPHP/security-advisories/blob/master/contao-components/mediaelement/CVE-2016-4567.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2016-4567.yaml
- https://github.com/mediaelement/mediaelement/blob/b992ccf5f0c04a207d98bbb0868420751a61ec90/changelog.md?plain=1#L1024
- https://github.com/mediaelement/mediaelement/blob/master/changelog.md
- https://web.archive.org/web/20170205142412/http://www.securitytracker.com/id/1035818
- https://wordpress.org/news/2016/05/wordpress-4-5-2
Sources
- CVE-2016-4567 · CVE Program
- CVE-2016-4567 · NVD
- FIRST EPSS
- GHSA-277w-qpxr-2549 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-4567 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences