The wfMangleFlashPolicy function in OutputHandler.php in MediaWiki before 1.19.22, 1.20.x through 1.22.x before 1.22.14, and 1.23.x before 1.23.7 allows remote attackers to conduct PHP object injection attacks via a crafted string containing <cross-domain-policy> in a PHP format request, which causes the string length to change when converting the request to <NOT-cross-domain-policy>.

Cross-site request forgery (CSRF) vulnerability in the Special:ExpandedTemplates page in MediaWiki before 1.19.22, 1.20.x through 1.22.x before 1.22.14, and 1.23.x before 1.23.7, when $wgRawHTML is set to true, allows remote attackers to hijack the authentication of users with edit permissions for requests that cross-site scripting (XSS) attacks via the wpInput parameter, which is not properly handled in the preview.

The (1) Special:Preferences and (2) Special:UserLogin pages in MediaWiki before 1.19.20, 1.22.x before 1.22.12 and 1.23.x before 1.23.5 allows remote authenticated users to conduct cross-site scripting (XSS) attacks or have unspecified other impact via crafted CSS, as demonstrated by modifying MediaWiki:Common.css.

MediaWiki before 1.19.18, 1.20.x through 1.22.x before 1.22.9, and 1.23.x before 1.23.2 does not enforce an IFRAME protection mechanism for transcluded pages, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.

The JSONP endpoint in includes/api/ApiFormatJson.php in MediaWiki before 1.19.18, 1.20.x through 1.22.x before 1.22.9, and 1.23.x before 1.23.2 accepts certain long callback values and does not restrict the initial bytes of a JSONP response, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks, and obtain sensitive information, via a crafted OBJECT element with SWF content consistent with a restricted character set.

Cross-site scripting (XSS) vulnerability in Special:PasswordReset in MediaWiki before 1.19.16, 1.21.x before 1.21.10, and 1.22.x before 1.22.7, when wgRawHtml is enabled, allows remote attackers to inject arbitrary web script or HTML via an invalid username.

maintenance/mwdoc-filter.php in MediaWiki before 1.20.3 allows remote attackers to read arbitrary files via unspecified vectors.

Session fixation vulnerability in the CentralAuth extension for MediaWiki before 1.18.6, 1.19.x before 1.19.3, and 1.20.x before 1.20.1 allows remote attackers to hijack web sessions via the centralauth_Session cookie.

Session fixation vulnerability in Special:UserLogin in MediaWiki before 1.18.6, 1.19.x before 1.19.3, and 1.20.x before 1.20.1 allows remote attackers to hijack web sessions via the session_id.

Multiple cross-site request forgery (CSRF) vulnerabilities in the (1) CreateProperty, (2) CreateTemplate, (3) CreateForm, and (4) CreateClass special pages in the SemanticForms extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allow remote attackers to hijack the authentication of users for requests that have unspecified impact and vectors.

Cross-site request forgery (CSRF) vulnerability in Special:CreateCategory in the SemanticForms extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to hijack the authentication of users for requests that create categories via unspecified vectors.

MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to obtain information about deleted page via the (1) log API, (2) enhanced RecentChanges, and (3) user watchlists.

Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to inject arbitrary web script or HTML via a -o-link attribute.

MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 does not properly sanitize SVG files, which allows remote attackers to have unspecified impact via invalid XML.

Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to inject arbitrary web script or HTML via crafted XSL in an SVG file.

Cross-site scripting (XSS) vulnerability in the TimeMediaHandler extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to inject arbitrary web script or HTML via vectors related to videos.

Buffer overflow in php-luasandbox in the Scribuntu extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 has unspecified impact and remote vectors.

The zend_inline_hash_func function in php-luasandbox in the Scribuntu extension for MediaWiki before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to converting Lua data structures to PHP, as demonstrated by passing { [{}] = 1 } to a module function.

Cross-site scripting (XSS) vulnerability in includes/actions/InfoAction.php in MediaWiki before 1.21.9 and 1.22.x before 1.22.6 allows remote attackers to inject arbitrary web script or HTML via the sort key in an info action.

includes/specials/SpecialChangePassword.php in MediaWiki before 1.19.14, 1.20.x and 1.21.x before 1.21.8, and 1.22.x before 1.22.5 does not properly handle a correctly authenticated but unintended login attempt, which makes it easier for remote authenticated users to obtain sensitive information by arranging for a victim to login to the attacker's account, as demonstrated by tracking the victim's activity, related to a "login CSRF" issue.