critical 9.1

CVE-2024-7525 json

It was possible for a web extension with minimal permissions to create a `StreamFilter` which could be used to read and modify the response…

published 2024-08-06 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-48432

cvss: 9.1; 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

It was possible for a web extension with minimal permissions to create a `StreamFilter` which could be used to read and modify the response body of requests on any site. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

Patch / fix

fixed in 4 distros 7

Mozilla Firefox 129
Mozilla Firefox ESR 115.14, 128.1
Mozilla Thunderbird 115.14, 128.1
mozilla firefox_esr 115.14, 128.1

debian ubuntu red hat suse opensuse almalinux rocky linux

firefox-esr Debian 12 115.14.0esr-1~deb12u1
firefox-esr Debian 14, Debian 13 115.14.0esr-1
thunderbird Debian 12 1:115.14.0-1~deb12u1
thunderbird Debian 14, Debian 13 1:128.1.0esr-1

debian advisories DEBIAN-CVE-2024-7525

firefox Ubuntu 20.04 LTS 129.0.1+build1-0ubuntu0.20.04.1
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-2024-7525

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 9 115.14.0-2.el9_4
firefox-x11 RHEL 9 115.14.0-2.el9_4
firefox RHEL 8 115.14.0-2.el8_10
thunderbird RHEL 9 115.14.0-1.el9_4
thunderbird RHEL 8 115.14.0-1.el8_10
thunderbird RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 115.14.0-1.el8_4
firefox RHEL 9.2 EUS 115.14.0-2.el9_2
firefox-x11 RHEL 9.2 EUS 115.14.0-2.el9_2

red hat advisories RHSA-2024:5322 RHSA-2024:5391 RHSA-2024:5392 RHSA-2024:5527 RHSA-2024:5328 RHSA-2024:5528

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
MozillaThunderbird SLE Workstation Extension 15 SP6, SLE Workstation Extension 15 SP5, SLE Module for Package Hub 15 SP6 +3 more 115.14.0-150200.8.174.1
MozillaFirefox SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128.1.0-150200.152.146.1
MozillaFirefox-branding-SLE SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES for SAP 15 SP2 +12 more 128-150200.9.16.1
MozillaFirefox SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 128.1.0-112.221.1
MozillaFirefox-branding-SLE SLES for SAP 12 SP5, SLES 12 SP5 128-35.15.1

suse advisories SUSE-SU-2024:3507-1 SUSE-SU-2024:3112-1 SUSE-SU-2024:3003-1 SUSE-SU-2024:2876-1

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 129.0-1.1
MozillaThunderbird openSUSE Tumbleweed 115.14.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:14260-1 openSUSE-SU-2024:14250-1

firefox AlmaLinux 9 115.14.0-2.el9_4.alma.1
firefox-x11 AlmaLinux 9 115.14.0-2.el9_4.alma.1
firefox AlmaLinux 8 115.14.0-2.el8_10.alma.1
thunderbird AlmaLinux 9 115.14.0-1.el9_4.alma.1
thunderbird AlmaLinux 8 115.14.0-1.el8_10.alma.1

almalinux advisories ALSA-2024:5322 ALSA-2024:5391 ALSA-2024:5392 ALSA-2024:5402

firefox Rocky Linux 8 115.14.0-2.el8_10
thunderbird Rocky Linux 8 115.14.0-1.el8_10

rocky linux advisories RLSA-2024:5391 RLSA-2024:5402

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-2024-7525 updated 2026-11-04 cvss 7.5

mozilla: Missing permission check when creating a StreamFilter

Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 thunderbird
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux AppStream (v. 8) firefox 115.14.0-2.el8_10, thunderbird 115.14.0-1.el8_10
fixed: vendor fix RHSA-2024:5391
Red Hat Enterprise Linux AppStream (v. 9) firefox 115.14.0-2.el9_4, firefox-x11 115.14.0-2.el9_4, thunderbird 115.14.0-1.el9_4
fixed: vendor fix RHSA-2024:5322
Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 115.14.0-2.el8_2, thunderbird 115.14.0-1.el8_2
fixed: vendor fix RHSA-2024:5323
Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox 115.14.0-2.el8_4, thunderbird 115.14.0-1.el8_4
fixed: vendor fix RHSA-2024:5325
Red Hat Enterprise Linux AppStream AUS (v.8.6) firefox 115.14.0-2.el8_6, thunderbird 115.14.0-1.el8_6
fixed: vendor fix RHSA-2024:5326
Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox 115.14.0-2.el8_4, thunderbird 115.14.0-1.el8_4
fixed: vendor fix RHSA-2024:5325
Red Hat Enterprise Linux AppStream E4S (v.8.6) firefox 115.14.0-2.el8_6, thunderbird 115.14.0-1.el8_6
fixed: vendor fix RHSA-2024:5326

show 6 more

Red Hat Enterprise Linux AppStream E4S (v.9.0) firefox 115.14.0-2.el9_0, thunderbird 115.14.0-1.el9_0
fixed: vendor fix RHSA-2024:5327
Red Hat Enterprise Linux AppStream EUS (v.8.8) firefox 115.14.0-2.el8_8, thunderbird 115.14.0-1.el8_8
fixed: vendor fix RHSA-2024:5329
Red Hat Enterprise Linux AppStream EUS (v.9.2) firefox 115.14.0-2.el9_2, firefox-x11 115.14.0-2.el9_2, thunderbird 115.14.0-1.el9_2
fixed: vendor fix RHSA-2024:5328
Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox 115.14.0-2.el8_4, thunderbird 115.14.0-1.el8_4
fixed: vendor fix RHSA-2024:5325
Red Hat Enterprise Linux AppStream TUS (v.8.6) firefox 115.14.0-2.el8_6, thunderbird 115.14.0-1.el8_6
fixed: vendor fix RHSA-2024:5326
Red Hat Enterprise Linux Server (v. 7 ELS) firefox 115.14.0-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) firefox 115.14.0-2.el7_9
fixed: vendor fix RHSA-2024:5324

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: yes
Technical impact: partial
Assessed: 2 y ago (2024-08-06)

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	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Mozilla Firefox
Mozilla Firefox ESR
Mozilla Thunderbird
mozilla firefox_esr

Classification

Weakness

CWE-284 Improper Access Control
CWE-276 Incorrect Default Permissions

References

mozilla.org /security/advisories/mfsa2024-33/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-34/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-35/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-37/
vendor-advisory
mozilla.org /security/advisories/mfsa2024-38/
vendor-advisory
bugzilla.mozilla.org /show_bug.cgi?id=1909298
issue-tracking, permissions-required

Sources

CVE List CVE-2024-7525
NVD CVE-2024-7525

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