{"id":"CVE-2020-27620","aliases":["EUVD-2020-20127","GHSA-w94f-pc5p-284r"],"status":"published","title":"The Cosmos Skin for MediaWiki through 1.35.0 has stored XSS because MediaWiki messages were not...","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.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01123,"percentile":0.66511,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2020-10-22T03:05:10Z","modified":"2026-06-17T03:09:22Z","products":[{"vendor":"mediawiki","product":"skin\\"}],"references":[{"url":"https://phabricator.wikimedia.org/T265440","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27620"},{"url":"https://github.com/advisories/GHSA-w94f-pc5p-284r"}],"sources":{"cve":[{"id":"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.","status":"published","published":"2020-10-22T03:05:10Z","modified":"2024-08-04T16:18:44.92Z","updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-20127","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.","status":"published","published":"2020-10-22T03:05:10Z","modified":"2024-08-04T16:18:44Z","updated_at":"2026-11-03T03:07:12.435876Z"}],"ghsa":[{"id":"GHSA-w94f-pc5p-284r","title":"The Cosmos Skin for MediaWiki through 1.35.0 has stored XSS because MediaWiki messages were not...","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.","status":"published","published":"2022-05-24T17:32:00Z","modified":"2023-01-29T05:04:28Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:45:33.67375Z"}],"nvd":[{"id":"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.","status":"published","published":"2020-10-22T04:15:11.907Z","modified":"2026-06-17T03:09:22.567Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:20.704992Z"}]}}