CVE-2023-25743

Name: CVE-2023-25743
Creator: NVD / NIST
Published: 2023-06-02T17:15:11.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2023-25743 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.*. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.65%

46.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-290

Affected Software

Vendor	Product	Versions
Mozilla	Firefox Focus	All versions

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1800203Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2023-05/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-06/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1800203Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2023-05/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-06/Vendor Advisory

Timeline

Published: Jun 2, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-25743?

How severe is CVE-2023-25743?

CVE-2023-25743 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2023-25743?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-25743?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST