Description
WordPress through 4.8.2, when domain-based flashmediaelement.swf sandboxing is not used, allows remote attackers to conduct cross-domain Flash injection (XSF) attacks by leveraging code contained within the wp-includes/js/mediaelement/flashmediaelement.swf file.
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 | wordpress | 4.1+dfsg-1 | — |
| Debian 13 | wordpress | 4.1+dfsg-1 | — |
| Debian 12 | wordpress | 4.1+dfsg-1 | — |
| Debian 7 | wordpress | 3.6.1+dfsg-1~deb7u17 | DLA-1151-1 |
Advisories 1
- DLA-1151-1 wordpress - security update Debian Security (DSA / DLA) · Mar 9, 2026