CVE-2021-1879

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2021-1879

Confirmed

Yes

2021-11-03 00:00 UTC

Timestamps

2021-11-03

2021-11-03

Scope

KEV entry: Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability | Affected: Apple / iOS, iPadOS, and watchOS | Description: 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. | Required action: Apply updates per vendor instructions. | Due date: 2021-11-17 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-1879

References
  • {'id': 'CVE-2021-1879', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-1879'}

f940dd78-c8e7-4917-8179-bc9dd88f28dd

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 12:28 UTC

2026-02-06 07:17 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-79"
  ],
  "date_added": "2021-11-03",
  "due_date": "2021-11-17",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "iOS, iPadOS, and watchOS",
  "vendorProject": "Apple",
  "vulnerabilityName": "Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability"
}
 -
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