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.
Fix
Patch, vendor advisory and mitigation references on NVD 9
- https://bugzilla.mozilla.org/show_bug.cgi?id=1817768 Issue 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=1817768 Issue 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=1817768 Issue Tracking, Permissions Required, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.5 · mozillaNVD modified 2026-10-23 23:10
Affected (CPE criteria) 3
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
References 9
- https://bugzilla.mozilla.org/show_bug.cgi?id=1817768 Issue 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=1817768 Issue 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=1817768 Issue Tracking, Permissions Required, Vendor Advisory