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Vulnerability details: VCID-fe84-n6d1-aaar
Vulnerability ID VCID-fe84-n6d1-aaar
Aliases CVE-2021-29961
Summary When styling and rendering an oversized `<select>` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox < 89.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-863 Incorrect Authorization
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29961.html
epss 0.00076 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00076 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00076 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00101 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
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epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.00316 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
epss 0.0037 https://api.first.org/data/v1/epss?cve=CVE-2021-29961
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29961
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-29961
cvssv3 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-29961
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-29961
archlinux High https://security.archlinux.org/AVG-2018
generic_textual Medium https://ubuntu.com/security/notices/USN-4978-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-23
generic_textual Medium https://www.mozilla.org/en-US/security/advisories/mfsa2021-23/#CVE-2021-29961
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29961.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29961
https://bugzilla.mozilla.org/show_bug.cgi?id=1700235
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29961
https://security.gentoo.org/glsa/202107-09
https://ubuntu.com/security/notices/USN-4978-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-23/#CVE-2021-29961
https://www.mozilla.org/security/advisories/mfsa2021-23/
ASA-202106-3 https://security.archlinux.org/ASA-202106-3
AVG-2018 https://security.archlinux.org/AVG-2018
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-2021-29961 https://nvd.nist.gov/vuln/detail/CVE-2021-29961
mfsa2021-23 https://www.mozilla.org/en-US/security/advisories/mfsa2021-23
USN-4978-1 https://usn.ubuntu.com/4978-1/
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29961
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:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29961
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: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29961
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 0.34874
EPSS Score 0.00076
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.