high 8.8

CVE-2024-8382 json

Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events.

published 2024-09-03 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-49138

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events. Web content that tried to use those interfaces would not be able to use them with elevated privileges, but their presence would indicate certain browser features had been used, such as when a user opened the Dev Tools console. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

Patch / fix

fixed in 4 distros 7

Mozilla Firefox 130
Mozilla Firefox ESR 115.15, 128.2
Mozilla Thunderbird 115.15, 128.2
mozilla firefox_esr 115.15, 128.2

debian ubuntu red hat suse opensuse almalinux rocky linux

firefox-esr Debian 12 115.15.0esr-1~deb12u1
firefox-esr Debian 14, Debian 13 115.15.0esr-1
thunderbird Debian 12 1:115.15.0-1~deb12u1
thunderbird Debian 14, Debian 13 1:128.2.0esr-1

debian advisories DEBIAN-CVE-2024-8382

firefox Ubuntu 20.04 LTS 130.0+build2-0ubuntu0.20.04.1
thunderbird Ubuntu 20.04 LTS 1:115.15.0+build1-0ubuntu0.20.04.1
thunderbird Ubuntu 22.04 LTS 1:115.15.0+build1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2024-8382

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

thunderbird RHEL 8 128.2.0-1.el8_10
thunderbird RHEL 9 128.2.0-1.el9_4
firefox RHEL 8 128.2.0-1.el8_10
firefox RHEL 9 128.2.0-1.el9_4
firefox-x11 RHEL 9 128.2.0-1.el9_4
thunderbird RHEL 8.2 AUS 128.2.0-1.el8_2
thunderbird RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 128.2.0-1.el8_4
thunderbird RHEL 9.0 E4S 128.2.0-1.el9_0

red hat advisories RHSA-2024:6723 RHSA-2024:6721 RHSA-2024:6722 RHSA-2024:6719 RHSA-2024:6892 RHSA-2024:6720

MozillaThunderbird SLE Workstation Extension 15 SP6, SLE Workstation Extension 15 SP5, SLE Module for Package Hub 15 SP6 +3 more 128.2.3-150200.8.177.1
MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128.2.0-150200.152.149.1
MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 128.2.0-112.225.1

suse advisories SUSE-SU-2024:3507-1 SUSE-SU-2024:3157-1 SUSE-SU-2024:3152-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
mozjs128 openSUSE Tumbleweed 128.2.0-1.1
MozillaFirefox openSUSE Tumbleweed 130.0.1-1.1
MozillaThunderbird openSUSE Tumbleweed 115.15.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:14369-1 openSUSE-SU-2024:14358-1 openSUSE-SU-2024:14325-1

firefox AlmaLinux 9 128.2.0-1.el9_4.alma.1
firefox-x11 AlmaLinux 9 128.2.0-1.el9_4.alma.1
firefox AlmaLinux 8 128.2.0-1.el8_10.alma.1
thunderbird AlmaLinux 9 128.2.0-1.el9_4.alma.1
thunderbird AlmaLinux 8 128.2.0-1.el8_10.alma.1

almalinux advisories ALSA-2024:6681 ALSA-2024:6682 ALSA-2024:6683 ALSA-2024:6684

firefox Rocky Linux 9 128.2.0-1.el9_4.0.1
thunderbird Rocky Linux 9 128.2.0-1.el9_4.0.1
firefox Rocky Linux 8 128.2.0-1.el8_10
thunderbird Rocky Linux 8 128.2.0-1.el8_10

rocky linux advisories RLSA-2024:6681 RLSA-2024:6683 RLSA-2024:6682 RLSA-2024:6684

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-8382 updated 2026-11-05 cvss 8.8

mozilla: Internal event interfaces were exposed to web content when browser EventHandler listener callbacks ran

Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 thunderbird
affected: workaround, no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 128.2.0-1.el8_10, thunderbird 128.2.0-1.el8_10
fixed: vendor fix RHSA-2024:6682
Red Hat Enterprise Linux AppStream (v. 9) firefox 128.2.0-1.el9_4, firefox-x11 128.2.0-1.el9_4, thunderbird 128.2.0-1.el9_4
fixed: vendor fix RHSA-2024:6681
Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 128.2.0-1.el8_2, thunderbird 128.2.0-1.el8_2
fixed: vendor fix RHSA-2024:6839
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 128.2.0-1.el8_4, thunderbird 128.2.0-1.el8_4
fixed: vendor fix RHSA-2024:6891
Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 128.2.0-1.el8_6
fixed: vendor fix RHSA-2024:6892
Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 128.2.0-1.el8_4, thunderbird 128.2.0-1.el8_4
fixed: vendor fix RHSA-2024:6891
Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 128.2.0-1.el8_6
fixed: vendor fix RHSA-2024:6892

show 6 more

Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 128.2.0-1.el9_0, thunderbird 128.2.0-1.el9_0
fixed: vendor fix RHSA-2024:6782
Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 128.2.0-1.el8_8, thunderbird 128.2.0-1.el8_8
fixed: vendor fix RHSA-2024:6850
Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 128.2.0-1.el9_2, firefox-x11 128.2.0-1.el9_2, thunderbird 128.2.0-1.el9_2
fixed: vendor fix RHSA-2024:6786
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 128.2.0-1.el8_4, thunderbird 128.2.0-1.el8_4
fixed: vendor fix RHSA-2024:6891
Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 128.2.0-1.el8_6, thunderbird 128.2.0-1.el8_6
fixed: vendor fix RHSA-2024:6892
Red Hat Enterprise Linux Server (v. 7 ELS) firefox 128.2.0-1.el7_9
fixed: vendor fix RHSA-2024:6838

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-10-30)

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox
Mozilla Firefox ESR
Mozilla Thunderbird
mozilla firefox_esr

Classification

Weakness

CWE-273 Improper Check for Dropped Privileges

References

mozilla.org /security/advisories/mfsa2024-39/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-40/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-41/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1906744
issue-tracking, permissions-required
mozilla.org /security/advisories/mfsa2024-43/
mozilla.org /security/advisories/mfsa2024-44/
lists.debian.org /debian-lts-announce/2024/09/msg00025.html
lists.debian.org /debian-lts-announce/2024/09/msg00012.html

Sources

CVE List CVE-2024-8382
NVD CVE-2024-8382

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary