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CVE-2023-4054

MEDIUM
5.5
CVSS Score
Published: August 1, 2023 at 03:00 PM UTC
Updated: June 17, 2026 at 06:36 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR· also runs on 1 platform

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

When opening appref-ms files, Firefox did not warn the user that these files may contain malicious code. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 116, Firefox ESR < 102.14, Firefox ESR < 115.1, Thunderbird < 102.14, and Thunderbird < 115.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 116v < 116.0102.0 ≤ v < 102.14115.0 ≤ v < 115.1
Affected range stops below 102.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 116, so it looks safe — our inference, not a vendor statement
Affected range stops below 116.0, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
Firefox ESR· Mozilla
60%
v < 102.14v < 115.1
Affected range stops below 102.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.1, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
60%
v < 102.14v < 115.1
Affected range stops below 102.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.1, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

References (6)

Issue TrackingPermissions Required
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1840777
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-29/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-30/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-31/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-32/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-33/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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