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Vulnerability details: VCID-nk86-xkfz-s7gj
Vulnerability ID VCID-nk86-xkfz-s7gj
Aliases CVE-2021-30633
Summary 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.
Status Published
Exploitability 2.0
Weighted Severity 8.6
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
epss 0.43519 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.43519 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.43519 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
epss 0.46777 https://api.first.org/data/v1/epss?cve=CVE-2021-30633
cvssv3.1 9.6 https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
ssvc Attend https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
cvssv3.1 9.6 https://crbug.com/1247766
ssvc Attend https://crbug.com/1247766
cvssv3.1 9.6 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
cvssv3.1 9.6 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30633
cvssv3.1 9.6 https://nvd.nist.gov/vuln/detail/CVE-2021-30633
archlinux High https://security.archlinux.org/AVG-2337
archlinux High https://security.archlinux.org/AVG-2379
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-30633
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30633
1247766 https://crbug.com/1247766
4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
ASA-202109-6 https://security.archlinux.org/ASA-202109-6
AVG-2337 https://security.archlinux.org/AVG-2337
AVG-2379 https://security.archlinux.org/AVG-2379
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:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
CVE-2021-30633 https://nvd.nist.gov/vuln/detail/CVE-2021-30633
PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
stable-channel-update-for-desktop.html https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
Data source KEV
Date added Nov. 3, 2021
Description Google Chromium Indexed DB API contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape 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-2021-30633
Ransomware campaign use Unknown
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://chromereleases.googleblog.com/2021/09/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/2025-01-29T16:51:06Z/ Found at https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://crbug.com/1247766
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/2025-01-29T16:51:06Z/ Found at https://crbug.com/1247766
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
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/2025-01-29T16:51:06Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
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/2025-01-29T16:51:06Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30633
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:C/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30633
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 0.97422
EPSS Score 0.43519
Published At Aug. 1, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:06.482802+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.14/community.json 37.0.0