CVE-2023-5727

Name: CVE-2023-5727
Creator: NVD / NIST
Published: 2023-10-25T18:17:44.263+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.86%

Last modified Jun 17, 2026

CVE-2023-5727 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on a user's computer. *Note: This issue only affected Windows operating systems. EPSS estimates a 0.86% chance of exploitation in the next 30 days.

Description

The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on a user's computer. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.86%

54.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 119.0
Mozilla	Firefox Esr	< 115.4
Mozilla	Thunderbird	< 115.4.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1847180Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1847180Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory

Timeline

Published: Oct 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5727?

How severe is CVE-2023-5727?

CVE-2023-5727 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.86% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5727?

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-2023-5727?

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

Scan your code now

Source: NVD / NIST