|Enable AJAX support.
|Introduced in version:||1.6.0 (r13335)|
|Removed in version:||still in use|
false in earlier versions (pre-1.10)
Enables AJAX support. Required by some extensions and optional features.
Before 1.8.0, enabling Ajax support implicitly activated auto-suggestion for the search bar. In later versions, it has to be enabled explicitly, see $wgAjaxSearch (up to 1.13.x) or $wgEnableMWSuggest (since 1.13.0).
"$wgUseAjax = true;" was a security issue in 1.6.x up to 1.9.0:
An XSS injection vulnerability was located in the AJAX support module, affecting MediaWiki 1.6.x and up when the optional setting $wgUseAjax is enabled.
There is no danger in the default configuration, with $wgUseAjax off.
If you are using an extension based on the optional Ajax module, either disable it or upgrade to a version containing the fix:
- 1.9: fixed in 1.9.3
- 1.8: fixed in 1.8.4
- 1.7: fixed in 1.7.3
- 1.6: fixed in 1.6.10
See also 
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