CVE-2021-1879 KEV
6.1
MEDIUM · CVSS 3.1 · EPSS 7.1% (pctl 94)
Patch first
On CISA KEV — known exploited in the wild, due 2021-11-17.
Description
This issue was addressed by improved management of object lifetimes. This issue is fixed in iOS 12.5.2, iOS 14.4.2 and iPadOS 14.4.2, watchOS 7.3.3. Processing maliciously crafted web content may lead to universal cross site scripting. Apple is aware of a report that this issue may have been actively exploited..
Scoring
| CVSS | 6.1 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| EPSS | 7.08% — more likely to be exploited than 94% of all CVEs |
| Weakness | CWE-79 |
| On CISA KEV | yes — remediate by 2021-11-17 |
| Public exploit | none known |
| Published | 2021-04-02 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2021-11-17 |
| Vendor / product | Apple / iOS, iPadOS, and watchOS |
| Ransomware use | none reported |
Affected (3)
| Vendor | Product |
|---|---|
| apple | ipados |
| apple | iphone os |
| apple | watchos |
References
- https://support.apple.com/en-us/HT212256
- https://support.apple.com/en-us/HT212257
- https://support.apple.com/en-us/HT212258
- https://support.apple.com/en-us/HT212256
- https://support.apple.com/en-us/HT212257
- https://support.apple.com/en-us/HT212258
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1879
→ the Explorer · watch your stack · NVD