PT-2021-6684 · Apple+5 · Watchos+11

Published 2020-11-23 · Updated 2022-02-17 · CVE-2021-1826

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions macOS Big Sur versions prior to 11.3 iOS versions prior to 14.5 iPadOS versions prior to 14.5 watchOS versions prior to 7.4 tvOS versions prior to 14.5

Description A logic issue was addressed with improved restrictions. Processing maliciously crafted web content may lead to universal cross site scripting. The issue is related to the WebKit modules, where lack of protection of the web page structure allows a remote attacker to compromise data integrity.

Recommendations For macOS Big Sur versions prior to 11.3, update to macOS Big Sur 11.3. For iOS versions prior to 14.5, update to iOS 14.5. For iPadOS versions prior to 14.5, update to iPadOS 14.5. For watchOS versions prior to 7.4, update to watchOS 7.4. For tvOS versions prior to 14.5, update to tvOS 14.5.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALSA-2021:1586

BDU:2022-02036

CESA-2021_1586

CVE-2021-1826

DSA-4797-1

DSA-4797-2

OPENSUSE-SU-2022:0182-1

OPENSUSE-SU-2022_0182-1

OPENSUSE-SU-2022_0182-2

RHSA-2021:1586

RHSA-2021_1586

RHSA-2025:10364

RLSA-2021:1586

SUSE-SU-2022:0142-1

SUSE-SU-2022:0182-1

SUSE-SU-2022:0182-2

SUSE-SU-2022:0183-1

Affected Products

Almalinux

Centos

Apple Macos

Red Hat

Rocky Linux

Suse

Webkit

Ios

Ipados

Macos Big Sur

Tvos

Watchos

References · 162

• 🔥❌ https://github.com/PeterMxx/ps4_8.00_vuln_poc · Exploit, Deleted
• https://osv.dev/vulnerability/DSA-4797-2 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2021:1586 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1826 · Security Note
• https://support.apple.com/en-us/HT212325 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-1826 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-1826 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1826 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4797-1 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2021:1586 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0182-2 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-1826 · Vendor Advisory
• https://support.apple.com/en-us/HT212323 · Vendor Advisory
• https://support.apple.com/en-us/HT212324 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2021-1586.html · Vendor Advisory