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MediaWiki 1.5.5 and 1.4.13 are a security and bugfix maintenance releases.

Detection for uploads of Windows Metafile (.wmf) images has been added to help protect against a client-side vulnerability in unpatched Microsoft Windows operating systems.

Sites which have enabled uploads and added non-standard file types (such as .ogg, .doc, or .pdf) should upgrade to this release to ensure that malicious .wmf files can't be uploaded with a fake extension; such files could put visitors to the site at risk.

For more details on this, see: http://en.wikipedia.org/wiki/Windows_Metafile_vulnerability

Additionally, a maintenance script removeUnusedAccounts.php has been added in 1.5.5; this replaces an older Perl script which had not been updated for the new schema in 1.5.

Release notes: 1.5.5: http://sourceforge.net/project/shownotes.php?release_id=383209 1.4.13: http://sourceforge.net/project/shownotes.php?release_id=383208

Download: http://prdownloads.sourceforge.net/wikipedia/mediawiki-1.5.5.tar.gz?download http://prdownloads.sourceforge.net/wikipedia/mediawiki-1.4.13.tar.gz?downloa...

MD5 checksums: 4210fe8559e08bb9d1d0e6e34f68cf37 mediawiki-1.5.5.tar.gz c297ba65d88b380d0cc31366d90cb23b mediawiki-1.4.13.tar.gz

SHA-1 checksums: 7f4f2f6aedaaf7d1ab2515416ef7e02c8fae61a6 mediawiki-1.5.5.tar.gz 7a604714d595d0ac07f2f5c382254002732fa3b3 mediawiki-1.4.13.tar.gz

Before asking for help, try the FAQ: http://meta.wikimedia.org/wiki/MediaWiki_FAQ

Low-traffic release announcements mailing list: (Please subscribe to receive announcements of security updates.) http://mail.wikipedia.org/mailman/listinfo/mediawiki-announce

Wiki admin help mailing list: http://mail.wikipedia.org/mailman/listinfo/mediawiki-l

Bug report system: http://bugzilla.wikimedia.org/

Play "stump the developers" live on IRC: #mediawiki on irc.freenode.net

- -- brion vibber (brion @ pobox.com / brion @ wikimedia.org)