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TI-2023-11015 Aliases CVE-2023-25743GHSA-j7hq-xhjg-3w36

Authentication bypass by spoofing in Mozilla Firefox

Priority HIGH 72CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 15 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-290.

Summary

A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing browser chrome.<br>*This bug only affects Firefox Focus. Other versions of Firefox are unaffected.*. This vulnerability affects Firefox < 110 and Firefox ESR < 102.8.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00649 51st percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 110Firefox ESR (Mozilla): 102.8Red Hat: 16 advisoriesRed Hat: 15 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 110110Patch availableCNA
MozillaFirefox ESRbefore 102.8102.8Patch availableCNA
  • Firefox VendorMozilla Affected before 110 Fixed in 110 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 102.8 Fixed in 102.8 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox_focus:-:*:*:*:*:*:*:*not specified by NVDVulnerableMozilla
  • cpe:2.3:a:mozilla:firefox_focus:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 110
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 102.8

Red Hat 16 advisories

  • RHSA-2023:0820 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) thunderbird-102.8.0-2.el8_4
  • RHSA-2023:0822 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-102.8.0-2.el8_6
  • RHSA-2023:0821 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.8.0-2.el8_7
Show 13 more Red Hat advisories
  • RHSA-2023:0817 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-102.8.0-2.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.8.0-2.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.8.0-2.el7_9
  • RHSA-2023:0823 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-102.8.0-2.el9_0
  • RHSA-2023:0824 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.8.0-2.el9_1
  • RHSA-2023:0819 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-102.8.0-2.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-102.8.0-2.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-102.8.0-2.el8_2
  • RHSA-2023:0818 Released 2023-02-20 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.8.0-2.el8_1
  • RHSA-2023:0812 Released 2023-02-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-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
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-102.8.0-2.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-102.8.0-2.el7_9
  • RHSA-2023:0808 Released 2023-02-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-102.8.0-2.el8_7
  • RHSA-2023:0807 Released 2023-02-20 · Red Hat rating Important
    Mozilla Firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox-102.8.0-2.el8_6
  • RHSA-2023:0811 Released 2023-02-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-102.8.0-2.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox-102.8.0-2.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox-102.8.0-2.el8_2
  • RHSA-2023:0810 Released 2023-02-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-102.8.0-2.el9_1, firefox-x11-102.8.0-2.el9_1
  • RHSA-2023:0809 Released 2023-02-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox-102.8.0-2.el9_0
  • RHSA-2023:0805 Released 2023-02-20 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) firefox-102.8.0-2.el8_4
  • RHSA-2023:0806 Released 2023-02-20 · Red Hat rating Important
    Mozilla Firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-102.8.0-2.el8_1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 110

    17 records Highest priority Priority HIGH 9 HIGH, 7 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2023-11012 Insufficiently protected credentials in Mozilla FirefoxPriority HIGH 73
    • TI-2023-11011 Use after free in Mozilla FirefoxPriority HIGH 73
    • TI-2023-11009 Incorrect type conversion in Mozilla FirefoxPriority HIGH 73
    Show all 17 records →
  • Release ·

    Mozilla Firefox ESR 102.8

    14 records Highest priority Priority HIGH 7 HIGH, 6 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2023-11011 Use after free in Mozilla FirefoxPriority HIGH 73
    • TI-2023-11009 Incorrect type conversion in Mozilla FirefoxPriority HIGH 73
    • TI-2023-11007 Use after free in Mozilla FirefoxPriority HIGH 73
    Show all 14 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:0808, RHSA-2023:0821
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:0810, RHSA-2023:0824
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2023:0811, RHSA-2023:0819
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2023:0806, RHSA-2023:0818
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2023:0811, RHSA-2023:0819
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2023:0805, RHSA-2023:0820
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:0807, RHSA-2023:0822
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:0809, RHSA-2023:0823
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2023:0811, RHSA-2023:0819
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:0812, RHSA-2023:0817
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2023:0812
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:0812
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:0812, RHSA-2023:0817
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:0812, RHSA-2023:0817
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2023:0812

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-25743
  2. 2026-10-03 Alias added: GHSA-j7hq-xhjg-3w36
  3. 2026-10-16 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 1

  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2022-09831 Use after free in Mozilla Firefox KEVCVSS 3.1HIGH 8.8
  • TI-2025-34723 Passkey phishing within Bluetooth range CVSS 3.1CRITICAL 9.8
  • TI-2023-13902 Different techniques existed to obscure the fullscreen notification in Firefox and Focus… CVSS 3.1CRITICAL 9.1
  • TI-2024-09702 Improper authentication in Mozilla Focus for iOS CVSS 3.1CRITICAL 9.1
  • TI-2026-07862 Protection mechanism failure in Mozilla Firefox CVSS 3.1HIGH 7.5
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences