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Known Exploited Vulnerability
8.8
HIGH CVSS 3.1
CVE-2021-30632
Google Chromium V8 Out-of-Bounds Write Vulnerability - [Actively Exploited]
Description

Out of bounds write in V8 in Google Chrome prior to 93.0.4577.82 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

INFO

Published Date :

Oct. 8, 2021, 9:15 p.m.

Last Modified :

Oct. 24, 2025, 9:08 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Google Chromium V8 Engine contains an out-of-bounds write 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.

Notes :

https://nvd.nist.gov/vuln/detail/CVE-2021-30632

Affected Products

The following products are affected by CVE-2021-30632 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fedoraproject fedora
1 Google chrome
1 Microsoft edge_chromium
: Total Affected Vendor : 3 | Products : 3
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.1 HIGH [email protected]
CVSS 3.1 HIGH 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
The vulnerability in Google Chrome and Chromium can be remediated by updating to the latest versions.
  • Update Chrome and Chromium to the latest versions.
  • Update Microsoft Edge to the latest version.
  • Update the affected packages, including chromedriver, chromium, and opera.
Public PoC/Exploit Available at Github

CVE-2021-30632 has a 22 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-30632.

URL Resource
http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html Third Party Advisory VDB Entry
https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html Release Notes
https://crbug.com/1247763 Permissions Required
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ Release Notes
http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html Third Party Advisory VDB Entry
https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html Release Notes
https://crbug.com/1247763 Permissions Required
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ Release Notes
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ Release Notes
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30632 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-30632 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-30632 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
wh1ant/vulnjs

Research browsers

Updated: 4 months, 1 week ago
40 stars 6 fork 6 watcher
Born at : March 10, 2025, 5:37 p.m. This repo has been linked 83 different CVEs too.
Profile Photo
gmh5225/vulnjs

Research browsers

JavaScript HTML

Updated: 7 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : March 10, 2025, 2:35 p.m. This repo has been linked 83 different CVEs too.
Profile Photo
lions2012/Penetration_Testing_POC

渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypass oa-getshell cve-cms

Assembly Python Shell PHP C++ C Go Ruby HTML Java

Updated: 5 months ago
14 stars 0 fork 0 watcher
Born at : Feb. 7, 2024, 2:08 p.m. This repo has been linked 305 different CVEs too.
Profile Photo
paulsery/CVE-2021-30632

m-y-mo: https://github.com/github/securitylab/tree/main/SecurityExploits/Chrome/v8/CVE-2021-30632

JavaScript HTML

Updated: 1 year, 9 months ago
0 stars 1 fork 1 watcher
Born at : Jan. 31, 2024, 3:28 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
wh1ant/vulnjs

Research browser

JavaScript HTML

Updated: 1 year, 8 months ago
1 stars 0 fork 0 watcher
Born at : Oct. 8, 2023, 11:44 a.m. This repo has been linked 20 different CVEs too.
Profile Photo
Rexturnull/WEB-PenTest

WEB Penetration Test All the thing

Updated: 3 months ago
1 stars 0 fork 0 watcher
Born at : Sept. 2, 2023, 8:26 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
maldev866/ChExp_CVE-2021-30632

None

HTML

Updated: 2 years, 7 months ago
0 stars 1 fork 1 watcher
Born at : March 21, 2023, 7:53 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
xuetusummer/Penetration_Testing_POC

None

Assembly Python Shell PHP C++ C Go Ruby HTML Java

Updated: 10 months, 1 week ago
9 stars 4 fork 4 watcher
Born at : Nov. 25, 2022, 2:30 a.m. This repo has been linked 270 different CVEs too.
Profile Photo
anvbis/chrome_v8_ndays

Chrome V8 n-day exploits that I've written.

JavaScript

Updated: 3 months, 1 week ago
134 stars 24 fork 24 watcher
Born at : Nov. 17, 2022, 3:04 a.m. This repo has been linked 14 different CVEs too.
Profile Photo
brandonshiyay/learn-v8

v8 learning stuff

JavaScript

Updated: 1 year, 3 months ago
1 stars 1 fork 1 watcher
Born at : Aug. 9, 2022, 9:02 a.m. This repo has been linked 5 different CVEs too.
Profile Photo
soosmile/POC

None

Updated: 6 months, 4 weeks ago
9 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 944 different CVEs too.
Profile Photo
tianstcht/v8-exploit

collection of my exp about v8

JavaScript

Updated: 4 months, 1 week ago
7 stars 1 fork 1 watcher
Born at : May 30, 2022, 7:35 a.m. This repo has been linked 5 different CVEs too.
Profile Photo
Ostorlab/KEV

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 2 weeks, 6 days ago
588 stars 42 fork 42 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1290 different CVEs too.
Profile Photo
winterwolf32/CVE-S---Penetration_Testing_POC-

None

Assembly Python Shell PHP C++ C Go Ruby HTML Java

Updated: 4 months, 1 week ago
16 stars 10 fork 10 watcher
Born at : Jan. 27, 2022, 9:53 a.m. This repo has been linked 193 different CVEs too.
Profile Photo
CrackerCat/cve-win

None

HTML

Updated: 3 years, 11 months ago
0 stars 1 fork 1 watcher
Born at : Nov. 1, 2021, 12:57 p.m. This repo has been linked 2 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-30632 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2021-30632 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Oct. 24, 2025

    Action Type Old Value New Value
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30632 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 22, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30632
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Removed Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30632
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 21, 2025

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30632
  • Modified Analysis by [email protected]

    Feb. 19, 2025

    Action Type Old Value New Value
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jan. 29, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Added CWE CWE-787
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html
    Added Reference https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
    Added Reference https://crbug.com/1247763
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
  • Modified Analysis by [email protected]

    Jul. 26, 2024

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html No Types Assigned http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html Third Party Advisory, VDB Entry
    Changed Reference Type https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html Release Notes, Vendor Advisory https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html Release Notes
    Changed Reference Type https://crbug.com/1247763 Permissions Required, Vendor Advisory https://crbug.com/1247763 Permissions Required
    Changed Reference Type https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ No Types Assigned https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ Release Notes
    Changed Reference Type https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ No Types Assigned https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ Release Notes
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Chrome https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ [No types assigned]
    Added Reference Chrome https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ [No types assigned]
    Removed Reference Chrome https://lists.fedoraproject.org/archives/list/[email protected]/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
    Removed Reference Chrome https://lists.fedoraproject.org/archives/list/[email protected]/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
  • CVE Modified by [email protected]

    Jun. 12, 2023

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/172845/Chrome-JIT-Compiler-Type-Confusion.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Nov. 23, 2021

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 17, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 10, 2021

    Action Type Old Value New Value
    Removed Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 30, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 12, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html No Types Assigned https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html Release Notes, Vendor Advisory
    Changed Reference Type https://crbug.com/1247763 No Types Assigned https://crbug.com/1247763 Permissions Required, Vendor Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ Mailing List, Third Party Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* versions up to (excluding) 93.0.4577.82
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 09, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 6.8
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

86.12 }} 0.86%

score

0.99355

percentile