{"schema_version":"1","data":[{"id":3504,"advisory_id":"d62213a1-2348-4a2b-bece-1e9cbf62583f","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-1879","source_published_at":"2021-11-03T00:00:00+00:00","published_at":"2026-10-24T21:36:15.222654+00:00","extraction_method":"structured","technologies":["core-kev","ios-ipados-and-watchos"],"cve_ids":["CVE-2021-1879"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability","summary":"Apple iOS, iPadOS, and watchOS WebKit contain an unspecified vulnerability that allows for universal cross-site scripting (XSS) when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-1879","products":[{"name":{"value":"iOS, iPadOS, and watchOS","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-1879","aliases":["CVE-2021-1879"],"affected":[],"modified":"2021-11-03T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-79"],"cveID":"CVE-2021-1879","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-1879","dueDate":"2021-11-17","product":"iOS, iPadOS, and watchOS","dateAdded":"2021-11-03","vendorProject":"Apple","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"Apple iOS, iPadOS, and watchOS WebKit contain an unspecified vulnerability that allows for universal cross-site scripting (XSS) when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.","vulnerabilityName":"Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability","knownRansomwareCampaignUse":"Unknown"}},"related_cves":[{"value":"CVE-2021-1879","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null}}],"next_after":3504,"next_before":3504}