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TI-2023-05270 Aliases CVE-2023-5727GHSA-5c37-6j7c-hr7x

The executable file warning was not presented when downloading .msix, .msixbundle, .appx…

Priority LOW 30Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00829 57th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 119Firefox ESR (Mozilla): 115.4+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefoxbefore 119119Patch availableCNA
MozillaFirefox ESRbefore 115.4115.4Patch availableCNA
MozillaThunderbirdbefore 115.4.1115.4.1Patch availableCNA
  • Firefox VendorMozilla Affected before 119 Fixed in 119 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 115.4 Fixed in 115.4 Patch available CNA
  • Thunderbird VendorMozilla Affected before 115.4.1 Fixed in 115.4.1 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 119.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 115.4VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 115.4.1VulnerableMozilla
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 119.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 115.4 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 115.4.1 Vulnerable ·Mozilla
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA Firefox (Mozilla) Fixed in 119
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 115.4
  • Fix · CNA Thunderbird (Mozilla) Fixed in 115.4.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Mozilla Firefox 119

    11 records Highest priority Priority MEDIUM 4 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2023-05273 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 52
    • TI-2023-05274 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 44
    • TI-2023-05271 Use after free in Mozilla FirefoxPriority MEDIUM 42
    Show all 11 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 115.4, 115.4.1

    8 records Highest priority Priority MEDIUM 3 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2023-05273 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 52
    • TI-2023-05271 Use after free in Mozilla FirefoxPriority MEDIUM 42
    • TI-2023-05267 Uncontrolled resource consumption in Mozilla FirefoxPriority MEDIUM 42
    Show all 8 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-5727
  2. 2026-10-03 Alias added: GHSA-5c37-6j7c-hr7x

References

Advisory 4

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences