{"api_version":"1","generated_at":"2026-04-23T07:57:41+00:00","cve":"CVE-2021-39186","urls":{"html":"https://cve.report/CVE-2021-39186","api":"https://cve.report/api/cve/CVE-2021-39186.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-39186","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-39186"},"summary":{"title":"CVE-2021-39186","description":"GlobalNewFiles is a MediaWiki extension maintained by Miraheze. Prior to commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d, the username column of the GlobalNewFiles special page is vulnerable to a stored XSS. Commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d contains a patch. As a workaround, one may disallow <,> (or other characters required to insert html/js) from being used in account names so an XSS is not possible.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2021-09-01 21:15:00","updated_at":"2021-09-10 19:34:00"},"problem_types":["CWE-20"],"metrics":[],"references":[{"url":"https://phabricator.miraheze.org/T7935","name":"https://phabricator.miraheze.org/T7935","refsource":"MISC","tags":[],"title":"⚓ T7935 Stored XSS in GlobalNewFiles (CVE-TBC)","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg","name":"https://github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg","refsource":"CONFIRM","tags":[],"title":"Improper Input Validation in GlobalNewFiles · Advisory · miraheze/GlobalNewFiles · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d","name":"https://github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d","refsource":"MISC","tags":[],"title":"SECURITY: Fix XSS issues GlobalNewFilesPager · miraheze/GlobalNewFiles@cee254e · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-39186","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-39186","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"39186","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"miraheze","cpe5":"globalnewfiles","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"mediawiki","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-39186","STATE":"PUBLIC","TITLE":"Improper Input Validation in GlobalNewFiles"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"GlobalNewFiles","version":{"version_data":[{"version_value":"< cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d"}]}}]},"vendor_name":"miraheze"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"GlobalNewFiles is a MediaWiki extension maintained by Miraheze. Prior to commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d, the username column of the GlobalNewFiles special page is vulnerable to a stored XSS. Commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d contains a patch. As a workaround, one may disallow <,> (or other characters required to insert html/js) from being used in account names so an XSS is not possible."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-20: Improper Input Validation"}]}]},"references":{"reference_data":[{"name":"https://github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg","refsource":"CONFIRM","url":"https://github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg"},{"name":"https://github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d","refsource":"MISC","url":"https://github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d"},{"name":"https://phabricator.miraheze.org/T7935","refsource":"MISC","url":"https://phabricator.miraheze.org/T7935"}]},"source":{"advisory":"GHSA-57p5-hqjq-h7vg","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2021-09-01 21:15:00","lastModifiedDate":"2021-09-10 19:34:00","problem_types":["CWE-20"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:miraheze:globalnewfiles:*:*:*:*:*:mediawiki:*:*","versionEndExcluding":"2021-09-01","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"39186","Ordinal":"214837","Title":"CVE-2021-39186","CVE":"CVE-2021-39186","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"39186","Ordinal":"1","NoteData":"GlobalNewFiles is a MediaWiki extension maintained by Miraheze. Prior to commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d, the username column of the GlobalNewFiles special page is vulnerable to a stored XSS. Commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d contains a patch. As a workaround, one may disallow <,> (or other characters required to insert html/js) from being used in account names so an XSS is not possible.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"39186","Ordinal":"2","NoteData":"2021-09-01","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"39186","Ordinal":"3","NoteData":"2021-09-06","Type":"Other","Title":"Modified"}]}}}