GitHub Advisory DatabaseGHSA-4VR7-M8P8-434HMediaWiki Cross-site Scripting (XSS) vulnerability
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
49.1%
In MediaWiki before 1.31.9 and 1.32.x through 1.34.x before 1.34.3, XSS related to jQuery can occur. The attacker creates a message with [javascript:payload xss] and turns it into a jQuery object with mw.message().parse(). The expected result is that the jQuery object does not contain an <a> tag (or it does not have a href attribute, or it’s empty, etc.). The actual result is that the object contains an <a href ="javascript… that executes when clicked.
Affected configurations
References
github.com/advisories/GHSA-4vr7-m8p8-434h
github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25814.yaml
lists.fedoraproject.org/archives/list/[email protected]/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
nvd.nist.gov/vuln/detail/CVE-2020-25814
phabricator.wikimedia.org/T86738
www.mediawiki.org/wiki/ResourceLoader/Core_modules#mediawiki.jqueryMsg
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
49.1%