CVE-2021-21123

Debian Security Advisory 4846-1

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Insufficient data validation in File System API in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Una comprobación insuficiente de datos en File System API en Google Chrome versiones anteriores a 88.0.4324.96, permitió a un atacante remoto omitir las restricciones del sistema de archivos por medio de una página HTML diseñada

Multiple vulnerabilities have been found in Chromium and Google Chrome, the worst of which could result in the arbitrary execution of code. Versions less than 88.0.4324.96 are affected.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-21 CVE Reserved
2021-01-25 CVE Published
2021-03-22 First Exploit
2024-08-03 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (3)

URL	Tag	Source
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21123	Third Party Advisory

URL	Date	SRC
https://github.com/Puliczek/CVE-2021-21123-PoC-Google-Chrome	2021-03-22

URL	Date	SRC

URL	Date	SRC
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html	2021-03-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Google Search vendor "Google"		Chrome Search vendor "Google" for product "Chrome"				< 88.0.4324.96 Search vendor "Google" for product "Chrome" and version " < 88.0.4324.96"		-		Affected
Microsoft Search vendor "Microsoft"		Edge Chromium Search vendor "Microsoft" for product "Edge Chromium"				< 88.0.705.50 Search vendor "Microsoft" for product "Edge Chromium" and version " < 88.0.705.50"		-		Affected