medium 4.3

CVE-2024-0749 json

A phishing site could have repurposed an `about:` dialog to show phishing content with an incorrect origin in the address bar.

published 2024-01-23 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-16538

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits: 0; none known

A phishing site could have repurposed an `about:` dialog to show phishing content with an incorrect origin in the address bar. This vulnerability affects Firefox < 122 and Thunderbird < 115.7.

Patch / fix

fixed in 2 distros 7

Mozilla Firefox 122
Mozilla Thunderbird 115.7

debian ubuntu red hat suse opensuse almalinux rocky linux

firefox-esr Debian 12 115.7.0esr-1~deb12u1
firefox-esr Debian 14, Debian 13 115.7.0esr-1
thunderbird Debian 12 1:115.7.0-1~deb12u1
thunderbird Debian 14, Debian 13 1:115.7.0-1

debian advisories DEBIAN-CVE-2024-0749

firefox Ubuntu 20.04 LTS 122.0+build2-0ubuntu0.20.04.1
thunderbird Ubuntu 20.04 LTS 1:115.8.1+build1-0ubuntu0.20.04.1
thunderbird Ubuntu 22.04 LTS 1:115.8.1+build1-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2024-0749

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

firefox RHEL 7 115.7.0-1.el7_9
thunderbird RHEL 9 115.7.0-1.el9_3
thunderbird RHEL 7 115.7.0-1.el7_9
thunderbird RHEL 8 115.7.0-1.el8_9
firefox RHEL 8 115.7.0-1.el8_9
firefox RHEL 9 115.7.0-1.el9_3
firefox-x11 RHEL 9 115.7.0-1.el9_3
thunderbird RHEL 8.8 EUS 115.7.0-1.el8_8

red hat advisories RHSA-2024:0598 RHSA-2024:0600 RHSA-2024:0565 RHSA-2024:0619 RHSA-2024:0602 RHSA-2024:0618

MozillaThunderbird SLE Workstation Extension 15 SP5, SLE Module for Package Hub 15 SP5, openSUSE Leap 15.5 115.7.0-150200.8.145.1
MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +10 more 115.7.0-150200.152.123.1
MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 115.7.0-112.197.1
MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 115.7.0-150000.150.122.1

suse advisories SUSE-SU-2024:0242-1 SUSE-SU-2024:0229-1 SUSE-SU-2024:0228-1 SUSE-SU-2024:0211-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaThunderbird openSUSE Tumbleweed 115.7.0-1.1
MozillaFirefox openSUSE Tumbleweed 122.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:13617-1 openSUSE-SU-2024:13626-1

thunderbird AlmaLinux 9 115.7.0-1.el9_3.alma
firefox AlmaLinux 9 115.7.0-1.el9_3.alma
firefox-x11 AlmaLinux 9 115.7.0-1.el9_3.alma
firefox AlmaLinux 8 115.7.0-1.el8_9.alma.1
thunderbird AlmaLinux 8 115.7.0-1.el8_9.alma.1

almalinux advisories ALSA-2024:0602 ALSA-2024:0603 ALSA-2024:0608 ALSA-2024:0609

firefox Rocky Linux 8 115.7.0-1.el8_9
thunderbird Rocky Linux 8 115.7.0-1.el8_9

rocky linux advisories RLSA-2024:0608 RLSA-2024:0609

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-2024-0749 updated 2026-11-05 cvss 6.1

Mozilla: Phishing site popup could show local origin in address bar

Red Hat Enterprise Linux 6 firefox, thunderbird
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 115.7.0-1.el8_9, thunderbird 115.7.0-1.el8_9
fixed: vendor fix RHSA-2024:0608
Red Hat Enterprise Linux AppStream (v. 9) firefox 115.7.0-1.el9_3, firefox-x11 115.7.0-1.el9_3, thunderbird 115.7.0-1.el9_3
fixed: vendor fix RHSA-2024:0603
Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 115.7.0-1.el8_2, thunderbird 115.7.0-1.el8_2
fixed: vendor fix RHSA-2024:0618
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 115.7.0-1.el8_4, thunderbird 115.7.0-1.el8_4
fixed: vendor fix RHSA-2024:0559
Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 115.7.0-1.el8_2, thunderbird 115.7.0-1.el8_2
fixed: vendor fix RHSA-2024:0618
Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 115.7.0-1.el8_4, thunderbird 115.7.0-1.el8_4
fixed: vendor fix RHSA-2024:0559
Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 115.7.0-1.el8_6, thunderbird 115.7.0-1.el8_6
fixed: vendor fix RHSA-2024:0622

show 6 more

Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 115.7.0-1.el8_8, thunderbird 115.7.0-1.el8_8
fixed: vendor fix RHSA-2024:0596
Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 115.7.0-1.el9_0, thunderbird 115.7.0-1.el9_0
fixed: vendor fix RHSA-2024:0615
Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 115.7.0-1.el9_2, firefox-x11 115.7.0-1.el9_2, thunderbird 115.7.0-1.el9_2
fixed: vendor fix RHSA-2024:0604
Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 115.7.0-1.el8_2, thunderbird 115.7.0-1.el8_2
fixed: vendor fix RHSA-2024:0618
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 115.7.0-1.el8_4, thunderbird 115.7.0-1.el8_4
fixed: vendor fix RHSA-2024:0559
Red Hat Enterprise Linux Client (v. 7) firefox 115.7.0-1.el7_9, thunderbird 115.7.0-1.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 115.7.0-1.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 115.7.0-1.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 115.7.0-1.el7_9, thunderbird 115.7.0-1.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 115.7.0-1.el7_9, thunderbird 115.7.0-1.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 115.7.0-1.el7_9
fixed: vendor fix RHSA-2024:0600

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: partial
Assessed: 2 y ago (2024-01-29)

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected products

Mozilla Firefox
Mozilla Thunderbird

Classification

Weakness

CWE-346 Origin Validation Error

References

mozilla.org /security/advisories/mfsa2024-01/
release-notes, vendor-advisory
mozilla.org /security/advisories/mfsa2024-04/
release-notes, vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1813463
issue-tracking, permissions-required
lists.debian.org /debian-lts-announce/2024/01/msg00015.html
mailing-list, third-party-advisory
lists.debian.org /debian-lts-announce/2024/01/msg00022.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2024-0749
NVD CVE-2024-0749

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.

Summary