Apple iOS < 14.4.2 XSS (HT212256)

medium Nessus Plugin ID 148263


The version of Apple iOS running on the mobile device is missing a vendor-supplied patch.


The version of Apple iOS running on the mobile device is prior to 14.4.2. It is, therefore, affected by a cross-site scripting (XSS) vulnerability in its WebKit component due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to click a specially crafted URL, to execute arbitrary script code in a user's browser session.


Upgrade to Apple iOS version 14.4.2 or later

See Also

Plugin Details

Severity: Medium

ID: 148263

File Name: apple_ios_1442_check.nbin

Version: 1.19

Type: local

Published: 4/1/2021

Updated: 11/30/2022

Risk Information


Risk Factor: Medium

Score: 6.3


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Temporal Vector: E:H/RL:OF/RC:C

CVSS Score Source: CVE-2021-1879


Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:apple:iphone_os

Required KB Items: mdm/dependency/unlocked

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/26/2021

Vulnerability Publication Date: 3/26/2021

CISA Known Exploited Dates: 11/17/2021

Reference Information

CVE: CVE-2021-1879

APPLE-SA: APPLE-SA-2021-03-26-1, HT212256

IAVA: 2021-A-0153-S