MEDIUMCVSS v3.1 6.1Actively exploited · CISA KEV since 2021-11-03Vulnerability
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.
Properties
- Euvd product
- IOS, iOS and iPadOS, watchOS
- Vulnerability name
- Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability
- First seen
- 2025-10-21T23:25:49+00:00
- Cvss score
- 6.1
- Epss score
- 0.07082
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2021-11-17
- Euvd assigner
- apple
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2021-11-03T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2021-11-03
- Score
- 6.1
- Euvd base score version
- 3.1
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Apple, Cisco
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 6.1
Related Entities (6)
AFFECTS_PRODUCT (3)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
Explore deeper with Ninja Signal's threat intelligence graph