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Fencer Vulns
high 8.8

CVE-2023-25737 json

An invalid downcast from <code>nsTextNode</code> to <code>SVGElement</code> could have lead to undefined behavior.

published 2023-06-02 3 y ago modified 2026-10-24 16 d ago also EUVD-2023-29644

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

An invalid downcast from <code>nsTextNode</code> to <code>SVGElement</code> could have lead to undefined behavior. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

Patch / fix

  • Mozilla Firefox 110
  • Mozilla Thunderbird 102.8
  • Mozilla Firefox ESR 102.8
  • firefox-esr Debian 14, Debian 13, Debian 12 102.8.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:102.8.0-1

debian advisories DEBIAN-CVE-2023-25737

  • firefox Ubuntu 18.04 LTS 110.0+build3-0ubuntu0.18.04.1
  • firefox Ubuntu 20.04 LTS 110.0+build3-0ubuntu0.20.04.1
  • thunderbird Ubuntu 18.04 LTS 1:102.8.0+build2-0ubuntu0.18.04.1
  • thunderbird Ubuntu 20.04 LTS 1:102.8.0+build2-0ubuntu0.20.04.1
  • thunderbird Ubuntu 22.04 LTS 1:102.8.0+build2-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-25737

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 9 102.8.0-2.el9_1
  • thunderbird RHEL 8 102.8.0-2.el8_7
  • thunderbird RHEL 7 102.8.0-2.el7_9
  • firefox RHEL 8 102.8.0-2.el8_7
  • firefox RHEL 9 102.8.0-2.el9_1
  • firefox-x11 RHEL 9 102.8.0-2.el9_1
  • firefox RHEL 7 102.8.0-2.el7_9
  • thunderbird RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 102.8.0-2.el8_2

red hat advisories RHSA-2023:0824RHSA-2023:0821RHSA-2023:0819RHSA-2023:0823RHSA-2023:0817RHSA-2023:0818

  • MozillaThunderbird SLE Workstation Extension 15 SP4, SLE Module for Package Hub 15 SP4, openSUSE Leap 15.4 102.8.0-150200.8.105.2
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 102.8.0-112.150.1
  • MozillaFirefox SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +9 more 102.8.0-150200.152.78.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLE High Performance Computing 15 SP1-LTSS 102.8.0-150000.150.76.1

suse advisories SUSE-SU-2023:0599-1SUSE-SU-2023:0469-1SUSE-SU-2023:0466-1SUSE-SU-2023:0461-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaThunderbird openSUSE Tumbleweed 102.8.0-1.1
  • MozillaFirefox openSUSE Tumbleweed 110.0.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:12713-1openSUSE-SU-2024:12753-1

  • firefox AlmaLinux 8 102.8.0-2.el8_7.alma
  • firefox AlmaLinux 9 102.8.0-2.el9_1.alma
  • firefox-x11 AlmaLinux 9 102.8.0-2.el9_1.alma
  • thunderbird AlmaLinux 8 102.8.0-2.el8_7.alma
  • thunderbird AlmaLinux 9 102.8.0-2.el9_1.alma

almalinux advisories ALSA-2023:0808ALSA-2023:0810ALSA-2023:0821ALSA-2023:0824

  • firefox Rocky Linux 9 102.8.0-2.el9_1
  • thunderbird Rocky Linux 9 102.8.0-2.el9_1
  • firefox Rocky Linux 8 102.8.0-2.el8_7
  • thunderbird Rocky Linux 8 102.8.0-2.el8_7

rocky linux advisories RLSA-2023:0810RLSA-2023:0824RLSA-2023:0808RLSA-2023:0821

  • firefox-esr Alpine 3.23, Alpine 3.22, Alpine 3.21 +3 more 102.8.0-r0

alpine advisories ALPINE-CVE-2023-25737

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2023-25737 updated cvss 8.8

Mozilla: Invalid downcast in SVGUtils::SetupStrokeGeometry

  • Red Hat Enterprise Linux 6 firefox, thunderbird
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) firefox 102.8.0-2.el8_7, thunderbird 102.8.0-2.el8_7
    fixed: vendor fix RHSA-2023:0808
  • Red Hat Enterprise Linux AppStream (v. 9) firefox 102.8.0-2.el9_1, firefox-x11 102.8.0-2.el9_1, thunderbird 102.8.0-2.el9_1
    fixed: vendor fix RHSA-2023:0810
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox 102.8.0-2.el8_2, thunderbird 102.8.0-2.el8_2
    fixed: vendor fix RHSA-2023:0811
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox 102.8.0-2.el8_1, thunderbird 102.8.0-2.el8_1
    fixed: vendor fix RHSA-2023:0806
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox 102.8.0-2.el8_2, thunderbird 102.8.0-2.el8_2
    fixed: vendor fix RHSA-2023:0811
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox 102.8.0-2.el8_4, thunderbird 102.8.0-2.el8_4
    fixed: vendor fix RHSA-2023:0805
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox 102.8.0-2.el8_6, thunderbird 102.8.0-2.el8_6
    fixed: vendor fix RHSA-2023:0807
show 3 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox 102.8.0-2.el9_0, thunderbird 102.8.0-2.el9_0
    fixed: vendor fix RHSA-2023:0809
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox 102.8.0-2.el8_2, thunderbird 102.8.0-2.el8_2
    fixed: vendor fix RHSA-2023:0811
  • Red Hat Enterprise Linux Client (v. 7) firefox 102.8.0-2.el7_9, thunderbird 102.8.0-2.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) firefox 102.8.0-2.el7_9 Red Hat Enterprise Linux Server (v. 7) firefox 102.8.0-2.el7_9 Red Hat Enterprise Linux Server Optional (v. 7) firefox 102.8.0-2.el7_9, thunderbird 102.8.0-2.el7_9 Red Hat Enterprise Linux Workstation (v. 7) firefox 102.8.0-2.el7_9, thunderbird 102.8.0-2.el7_9 Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 102.8.0-2.el7_9
    fixed: vendor fix RHSA-2023:0812

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
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1811464 referenced PoC, tagged "exploit" by a source, unverified

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 Thunderbird
  • Mozilla Firefox ESR

Classification

Weakness
  • CWE-704 Incorrect Type Conversion or Cast

References

Sources

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.