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Vulnerability details: VCID-fxgu-ragu-r7cw
Vulnerability ID VCID-fxgu-ragu-r7cw
Aliases CVE-2021-30563
Summary Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Status Published
Exploitability 2.0
Weighted Severity 8.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
System Score Found at
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
epss 0.11431 https://api.first.org/data/v1/epss?cve=CVE-2021-30563
cvssv3.1 8.8 https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
ssvc Attend https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
cvssv3.1 8.8 https://crbug.com/1228407
ssvc Attend https://crbug.com/1228407
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30563
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30563
archlinux High https://security.archlinux.org/AVG-2166
archlinux High https://security.archlinux.org/AVG-2167
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-30563
https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30563
1228407 https://crbug.com/1228407
990079 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990079
ASA-202107-30 https://security.archlinux.org/ASA-202107-30
ASA-202107-31 https://security.archlinux.org/ASA-202107-31
AVG-2166 https://security.archlinux.org/AVG-2166
AVG-2167 https://security.archlinux.org/AVG-2167
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
CVE-2021-30563 https://nvd.nist.gov/vuln/detail/CVE-2021-30563
Data source KEV
Date added Nov. 3, 2021
Description Google Chromium V8 Engine contains a type confusion vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action Apply updates per vendor instructions.
Due date Nov. 17, 2021
Note 
https://nvd.nist.gov/vuln/detail/CVE-2021-30563
Ransomware campaign use Unknown
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:52:39Z/ Found at https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://crbug.com/1228407
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:52:39Z/ Found at https://crbug.com/1228407
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30563
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30563
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.93295
EPSS Score 0.11431
Published At Aug. 8, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:46.481386+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.18/community.json 37.0.0