Description
Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.4, when Internet Explorer 6 or earlier is used, allows remote attackers to inject arbitrary web script or HTML via an uploaded file accessed with a dangerous extension such as .html located before a ? (question mark) in a query string, in conjunction with a modified URI path that has a %2E sequence in place of the . (dot) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-1578.
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 | mediawiki | 1:1.15.5-5 | — |
| Debian 13 | mediawiki | 1:1.15.5-5 | — |
| Debian 12 | mediawiki | 1:1.15.5-5 | — |
| Debian 6.0 | mediawiki | 1:1.15.5-2squeeze2 | DSA-2366-1 |
| Debian 5.0 | mediawiki | 1:1.12.0-2lenny9 | DSA-2366-1 |
Advisories 1
- DSA-2366-1 mediawiki - multiple Debian Security (DSA / DLA) · Mar 9, 2026