PT-2021-2063 · Google+3 · Google Chrome+3

Maciej Pulikowski · Published 2021-01-19 · Updated 2025-09-29 · CVE-2021-21123

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Google Chrome versions prior to 88.0.4324.96

Description: The issue is related to insufficient data validation in the File System API, allowing a remote attacker to bypass filesystem restrictions. This can be achieved via a crafted HTML page. There is no information provided about the estimated number of potentially affected devices worldwide or real-world incidents where this issue was exploited.

Recommendations: For versions prior to 88.0.4324.96, update to version 88.0.4324.96 or later to resolve the issue. As a temporary workaround, consider restricting access to the File System API until a patch is available. Avoid using the File System API in affected versions until the issue is resolved.

Exploit

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALSA-2025_16880

ALT-PU-2021-1146

ALT-PU-2021-1179

ALT-PU-2021-1198

ALT-PU-2021-1210

ALT-PU-2021-1379

BDU:2021-00910

CVE-2021-21123

DSA-4846-1

MGASA-2021-0406

OPENSUSE-SU-2021:0166-1

OPENSUSE-SU-2021:0173-1

OPENSUSE-SU-2021:0177-1

OPENSUSE-SU-2021:0186-1

OPENSUSE-SU-2021:0973-1

OPENSUSE-SU-2021:1016-1

OPENSUSE-SU-2021_0166-1

OPENSUSE-SU-2021_0173-1

OPENSUSE-SU-2021_0973-1

OPENSUSE-SU-2024:10681-1

OPENSUSE-SU-2024:10977-1

OPENSUSE-SU-2024:12948-1

Affected Products

Alt Linux

Astra Linux

Google Chrome

Suse

References · 2360

• 🔥 https://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-21123 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-21123 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21123 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0173-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-21123 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-21123 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:12948-1 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4846-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se47-bulletin-2022-0114SE47 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0406.html · Security Note
• https://ubuntu.com/security/CVE-2021-21123 · Vendor Advisory
• https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0166-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2021-1126SE17 · Vendor Advisory