Homepage
About Snyk

Access Restriction Bypass Affecting mediawiki/core package, versions >=1.32.0, <1.35.2 <1.31.12

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.33% (71st percentile)
Expand this section
NVD
4.3 medium
Expand this section
Red Hat
6.5 medium

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-PHP-MEDIAWIKICORE-1244522
  • published 9 Apr 2021
  • disclosed 9 Apr 2021
  • credit Unknown
Report a new vulnerability Found a mistake?

Introduced: 9 Apr 2021

CVE-2021-30159 Open this link in a new tab
CWE-284 Open this link in a new tab

How to fix?

Upgrade mediawiki/core to version 1.35.2, 1.31.12 or higher.

Overview

mediawiki/core is a Free software wiki application developed by the Wikimedia Foundation and others.

Note: This package is not maintained on Packagist anymore, but newer releases exist.

Affected versions of this package are vulnerable to Access Restriction Bypass. Users can bypass intended restrictions on deleting pages in certain "fast double move" situations. MovePage::isValidMoveTarget() uses FOR UPDATE, but it's only called if Title::getArticleID() returns non-zero with no special flags. Next, MovePage::moveToInternal() will delete the page if getArticleID(READ_LATEST) is non-zero. Therefore, if the page is missing in the replica DB, isValidMove() will return true, and then moveToInternal() will unconditionally delete the page if it can be found in the master.

References