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 (4)
Core 4
Core References
Vendor Advisory x_refsource_misc
https://phabricator.wikimedia.org/T265440
Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749
Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752
Vendor Advisory x_refsource_misc
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751
Scores
CVSS v3
6.1
EPSS
0.0053
EPSS Percentile
67.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Details
CWE
CWE-79
Status
published
Products (1)
mediawiki/skin\
< 1.35.0
Published
Oct 22, 2020
Tracked Since
Feb 18, 2026