Due to the Firefox GTK wrapper code's use of text/plain for drag data and GTK treating all text/plain MIMEs containing file URLs as being dragged a website could arbitrarily read a file via a call to `DataTransfer.setData`. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.
Fix
Patch, vendor advisory and mitigation references on NVD 8
- https://bugzilla.mozilla.org/show_bug.cgi?id=1800425 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-01/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-02/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-03/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1800425 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-01/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-02/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-03/ 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 8
- https://bugzilla.mozilla.org/show_bug.cgi?id=1800425 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-01/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-02/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-03/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1800425 Issue Tracking, Permissions Required, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-01/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-02/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-03/ Vendor Advisory