Debian Stretch DSA-4036-1 Critical MediaWiki Security Update

Multiple security vulnerabilities have been discovered in MediaWiki, a
website engine for collaborative work:

CVE-2017-8808

Cross-site-scripting with non-standard URL escaping and
$wgShowExceptionDetails disabled.

CVE-2017-8809

Reflected file download in API.

CVE-2017-8810

On private wikis the login form didn't distinguish between
login failure due to bad username and bad password.

CVE-2017-8811

It was possible to mangle HTML via raw message parameter
expansion.

CVE-2017-8812

id attributes in headlines allowed raw '>'.

CVE-2017-8814

Language converter could be tricked into replacing text inside tags.

CVE-2017-8815

Unsafe attribute injection via glossary rules in language converter.

For the stable distribution (stretch), these problems have been fixed in
version 1:1.27.4-1~deb9u1.

We recommend that you upgrade your mediawiki packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
f...