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CVE-2023-5726

MEDIUM
4.3
CVSS Score
Published: October 24, 2023 at 12:47 PM UTC
Updated: June 17, 2026 at 06:49 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR· also runs on 1 platform

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

A website could have obscured the full screen notification by using the file open dialog. This could have led to user confusion and possible spoofing attacks. *Note: This issue only affected macOS operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Affected

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

Firefox· Mozilla
95%
v < 119
Affected range stops below 119, so it looks safe — our inference, not a vendor statement
Affected range stops below 119.0, so it looks safe — our inference, not a vendor statement
apple-macos (environment)
Firefox ESR· Mozilla
95%
v < 115.4
Affected range stops below 115.4, so it looks safe — our inference, not a vendor statement
apple-macos (environment)
Thunderbird· Mozilla
95%
v < 115.4.1
Affected range stops below 115.4.1, so it looks safe — our inference, not a vendor statement
apple-macos (environment)

Runs on — not affected

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

References (4)

Issue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1846205
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-45/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-46/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-47/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

4.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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