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CVE-2020-27620

Date: October 21, 2020

The Cosmos Skin for MediaWiki through 1.35.0 has stored XSS because MediaWiki messages were not being properly escaped. This is related to wfMessage and Html::rawElement, as demonstrated by CosmosSocialProfile::getUserGroups.

Language: PHP

Severity Score

Related Resources (6)

https://phabricator.wikimedia.org/T265440
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751
https://nvd.nist.gov/vuln/detail/CVE-2020-27620
https://www.mend.io/vulnerability-database/CVE-2020-27620

Severity Score

Weakness Type (CWE)

Cross-Site Scripting (XSS)

CWE-79

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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