CVE-2023-29542
criticalA newline in a filename could have been used to bypass the file extension security mechanisms that replace malicious file extensions such as .lnk with .downloa…
Vendor / product: Mozilla — firefox
A newline in a filename could have been used to bypass the file extension security mechanisms that replace malicious file extensions such as .lnk with .download. This could have led to accidental execution of malicious code. *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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2023-06-19 11:15
Modified: 2026-10-23 23:10
NVD status: Modified
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
mozilla / firefox <112.0
mozilla / firefox_esr <102.10
mozilla / thunderbird <102.10
Weakness classification (CWE)
NVD-CWE-noinfo
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: 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://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/
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1810793 security@mozilla.org
- https://bugzilla.mozilla.org/show_bug.cgi?id=1815062 security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2023-13/ security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2023-14/ security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2023-15/ security@mozilla.org
- https://bugzilla.mozilla.org/show_bug.cgi?id=1810793 af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.mozilla.org/show_bug.cgi?id=1815062 af854a3a-2127-422b-91ae-364da2661108
- https://www.mozilla.org/security/advisories/mfsa2023-13/ af854a3a-2127-422b-91ae-364da2661108
- https://www.mozilla.org/security/advisories/mfsa2023-14/ af854a3a-2127-422b-91ae-364da2661108
- https://www.mozilla.org/security/advisories/mfsa2023-15/ af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗