Description
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."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mediaelement | No fix yet | — |
| Debian 13 | mediaelement | No fix yet | — |
| Debian 12 | mediaelement | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mediaelement | No fix yet | — |
| Ubuntu 26.04 LTS | mediaelement | No fix yet | — |
| Ubuntu 25.10 | mediaelement | No fix yet | — |
| Ubuntu 24.04 LTS | mediaelement | No fix yet | — |
| Ubuntu 22.04 LTS | mediaelement | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mediaelement | No fix yet | — |
| Ubuntu 18.04 LTS | mediaelement | No fix yet | — |
| Ubuntu 16.04 LTS | mediaelement | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | mediaelement | < 2.11.1 | 2.11.1 | GHSA-277w-qpxr-2549 |
| Packagist | contao-components/mediaelement | >= 2.14.2, < 2.21.1 | 2.21.1 | GHSA-277w-qpxr-2549 |
| Packagist | contao/core | >= 3.0.0, < 3.5.15 | 3.5.15 | GHSA-277w-qpxr-2549 |
References
- https://github.com/johndyer/mediaelement/blob/master/changelog.md
- [oss-security] 20160507 CVE Request: wordpress and mediaelement mailing-list
- https://codex.wordpress.org/Version_4.5.2
- 1035818 vdb-entry
- https://gist.github.com/cure53/df34ea68c26441f3ae98f821ba1feb9c
- https://github.com/johndyer/mediaelement/commit/34834eef8ac830b9145df169ec22016a4350f06e
- https://wpvulndb.com/vulnerabilities/8488
- https://wordpress.org/news/2016/05/wordpress-4-5-2/
- https://core.trac.wordpress.org/changeset/37371