CVE-2023-5727
The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on…
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle files, which can run commands on a user's computer. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
Timeline
ID reserved
By mozilla
- 1 day later
· 1 day later
Published
- 11 months later
· 11 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.83% · top 42% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- Download Protections were bypassed by .msix, .msixbundle, .appx, and .appxbundle files on Windows
Affected products
- affected unspecified – < 119
- affected unspecified – < 115.4
- affected unspecified – < 115.4.1
References (4)
- https://bugzilla.mozilla.org/show_bug.cgi?id=1847180 (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-45/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-46/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-47/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-5727)Record last updated .