CVE-2024-9391

mediumpriority · track · 0EPSS 0.003 · 20 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (20th) EPSS

CVSS 5.4 · medium

Is it mine?

24 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full screen mode. This may allow spoofing of other sites as the address bar is no longer visible. *This bug only affects Firefox Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 131.

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.4–7.1

v3.15.4mediumAV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondaryexploitability 3.9 · impact 2.5

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:Nsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1021USCWE-290USCWE-451US

affected products (24)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Mozilla Firefox <131all versionscert_bundDE
Mozilla Firefox ESR <115.16all versionscert_bundDE
Mozilla Firefox ESR <128.3all versionscert_bundDE
Mozilla Thunderbird <128.3all versionscert_bundDE
Mozilla Thunderbird <131all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Mozilla Firefox≤ ESR <128.3cert_bundDE
Mozilla Firefox≤ ESR <115.16cert_bundDE
Mozilla Firefox< 131cert_bundDE
Mozilla Thunderbird< 128.3cert_bundDE
Mozilla Thunderbird< 131cert_bundDE

showing 20 of 24

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2024-0387Kwetsbaarheden verholpen in Mozilla Firefox en ThunderbirdNL2024-10-02csaf · ncsc_nlNL
Mozilla heeft kwetsbaarheden verholpen in Firefox en Thunderbird.
WID-SEC-W-2024-3057Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere SchwachstellenDeutsch2024-10-01csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbird ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, einen Denial-of-Service-Zustand zu erzeugen und vertrauliche Informationen preiszugeben.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl NVD CVE.org MITRE

published 2024-10-01modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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