CVE-2023-28163

Name: CVE-2023-28163
Creator: NVD / NIST
Published: 2023-06-02T17:15:12.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2023-28163 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. When downloading files through the Save As dialog on Windows with suggested filenames containing environment variable names, Windows would have resolved those in the context of the current user. <br>*This bug only affects Firefox on Windows. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

When downloading files through the Save As dialog on Windows with suggested filenames containing environment variable names, Windows would have resolved those in the context of the current user. <br>*This bug only affects Firefox on Windows. Other versions of Firefox are unaffected.*. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.

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

0.80%

51.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 111.0
Mozilla	Firefox Esr	< 102.9
Mozilla	Thunderbird	< 102.9

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1817768Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-09/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-11/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1817768Issue Tracking, Permissions Required, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-09/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-11/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1817768Issue Tracking, Permissions Required, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2023-28163?

How severe is CVE-2023-28163?

CVE-2023-28163 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28163?

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-2023-28163?

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

Scan your code now

Source: NVD / NIST