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Vulnerability details: VCID-9q27-mmmy-1qbu
Vulnerability ID VCID-9q27-mmmy-1qbu
Aliases CVE-2021-23962
Summary Incorrect use of the RowCountChanged method could have led to a user-after-poison and a potentially exploitable crash.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2021-23962
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23962
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-23962
archlinux High https://security.archlinux.org/AVG-1492
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-03
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-23962
https://bugzilla.mozilla.org/show_bug.cgi?id=1677194
https://www.mozilla.org/security/advisories/mfsa2021-03/
ASA-202102-1 https://security.archlinux.org/ASA-202102-1
AVG-1492 https://security.archlinux.org/AVG-1492
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
CVE-2021-23962 https://nvd.nist.gov/vuln/detail/CVE-2021-23962
mfsa2021-03 https://www.mozilla.org/en-US/security/advisories/mfsa2021-03
USN-4717-1 https://usn.ubuntu.com/4717-1/
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-2021-23962
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-2021-23962
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 0.56195
EPSS Score 0.00342
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:50.476085+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2021/mfsa2021-03.yml 37.0.0