Debian: DSA-4301-1 Critical MediaWiki Flaws in Rate Limits and Account Lock

Multiple security vulnerabilities have been discovered in MediaWiki, a
website engine for collaborative work, which result in incorrectly
configured rate limits, information disclosure in Special:Redirect/logid
and bypass of an account lock.

For the stable distribution (stretch), these problems have been fixed in
version 1:1.27.5-1~deb9u1.

We recommend that you upgrade your mediawiki packages.

For the detailed security status of mediawiki please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/mediawiki

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/