CVE-2023-4052The Firefox updater created a directory writable by non-privileged users.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
The Firefox updater created a directory writable by non-privileged users. When uninstalling Firefox, any files in that directory would be recursively deleted with the permissions of the uninstalling user account. This could be combined with creation of a junction (a form of symbolic link) to allow arbitrary file deletion controlled by the non-privileged user. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 116, Firefox ESR < 115.1, and Thunderbird < 115.1.
- CVSS
- 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-59
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 23, 2026
- First seen by InfoSec Signals
- Oct 23, 2026
Affected products
mozilla firefox mozilla:firefox | before 116.0 | NVD |
mozilla firefox_esr mozilla:firefox_esr | before 115.1 | NVD |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1824420issue-tracking, permissions-required
- https://www.mozilla.org/security/advisories/mfsa2023-29/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2023-31/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2023-33/
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.