CVE-2023-29545

Name: CVE-2023-29545
Creator: NVD / NIST
Published: 2023-06-19T11:15:09.89+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2023-29545 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user. *This bug only affects Firefox and Thunderbird on Windows. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user. *This bug only affects Firefox and Thunderbird on Windows. Other versions of Firefox and Thunderbird are unaffected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

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

0.58%

43.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 112.0
Mozilla	Firefox Esr	< 102.10
Mozilla	Thunderbird	< 102.10

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1823077Permissions Required
https://www.mozilla.org/security/advisories/mfsa2023-13/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-14/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1823077Permissions Required
https://www.mozilla.org/security/advisories/mfsa2023-13/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-14/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/Vendor Advisory

Timeline

Published: Jun 19, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-29545?

How severe is CVE-2023-29545?

CVE-2023-29545 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2023-29545?

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-2023-29545?

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

Scan your code now

Source: NVD / NIST