Exploitation Summary
CVE-2021-30633 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021.
Description
Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.
References (5)
Core 5
Core References
Release Notes x_refsource_misc
https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
Permissions Required x_refsource_misc
https://crbug.com/1247766
Release Notes vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
Release Notes vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30633
Scores
CVSS v3
9.6
EPSS
0.3006
EPSS Percentile
96.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
active
Automatable
no
Technical Impact
total
Details
CISA KEV
2021-11-03
VulnCheck KEV
2021-09-08
InTheWild.io
2021-09-08
ENISA EUVD
EUVD-2021-17553
CWE
CWE-416
Status
published
Products (3)
fedoraproject/fedora
33
fedoraproject/fedora
35
google/chrome
< 93.0.4577.82
Published
Oct 08, 2021
KEV Added
Nov 03, 2021
Tracked Since
Feb 18, 2026