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Vulnerability details: VCID-3m3n-9xzn-bqgr
Vulnerability ID VCID-3m3n-9xzn-bqgr
Aliases CVE-2021-30555
Summary Use after free in Sharing in Google Chrome prior to 91.0.4472.114 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted HTML page and user gesture.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
epss 0.00287 https://api.first.org/data/v1/epss?cve=CVE-2021-30555
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30555
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30555
archlinux High https://security.archlinux.org/AVG-2081
archlinux High https://security.archlinux.org/AVG-2082
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-30555
https://crbug.com/1215029
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30555
990079 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990079
ASA-202106-46 https://security.archlinux.org/ASA-202106-46
ASA-202106-47 https://security.archlinux.org/ASA-202106-47
AVG-2081 https://security.archlinux.org/AVG-2081
AVG-2082 https://security.archlinux.org/AVG-2082
CVE-2021-30555 https://nvd.nist.gov/vuln/detail/CVE-2021-30555
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30555
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-2021-30555
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 0.51875
EPSS Score 0.00287
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:33:52.871730+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.15/community.json 37.0.0