Medium severity6.1NVD Advisory· Published Oct 22, 2020· Updated Jun 17, 2026

CVE-2020-27620

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

MediaWiki/Skin\
cpe:2.3:a:mediawiki:skin\:cosmos:*:*:*:*:*:*:*:*
Range: <=1.35.0
MediaWiki/Cosmos Skinllm-create
Range: <=1.35.0
Wikimedia Foundation/Cosmosllm-create
Range: <=1.35.0
MediaWiki/Cosmos Skin for MediaWikidescription

Patches

Vulnerability mechanics

References

gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749nvdVendor Advisory
gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751nvdVendor Advisory
gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752nvdVendor Advisory
phabricator.wikimedia.org/T265440nvdVendor Advisory

News mentions

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cvss	0.397
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000