CVE-2021-1879

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. Vendor/Product: Apple iOS, iPadOS, and watchOS. Added to CISA KEV 2021-11-03; required action: Apply updates per vendor instructions.