CVE-2023-4575
This could have led to a use-after-free causing a potentially exploitable crash.
Does this matter?
Lower severity and a low EPSS score (0.66%). Track it; it rarely justifies an emergency change on its own.
Description
When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.66% probability · 51th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- mozilla/firefox · mozilla/firefox esr · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1846689Issue Tracking
- https://www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-35/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-37/
- https://www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1846689Issue Tracking
- https://www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-35/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-37/
- https://www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.