CVE-2020-27620

medium

Description

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.

References

https://phabricator.wikimedia.org/T265440

https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752

https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751

https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749

Details

Source: Mitre, NVD

Published: 2020-10-22

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N