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CVE-2023-29533

MEDIUM
4.3
CVSS Score
Published: June 2, 2023 at 12:00 AM UTC
Updated: August 19, 2026 at 03:29 PM UTC
5 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

A website could have obscured the fullscreen notification by using a combination of <code>window.open</code>, fullscreen requests, <code>window.name</code> assignments, and <code>setInterval</code> calls. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Affected

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

Firefox· Mozilla
95%
v < 112v < 112.0
Affected range stops below 112, so it looks safe — our inference, not a vendor statement
Affected range stops below 112.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 102.10
Affected range stops below 102.10, so it looks safe — our inference, not a vendor statement
Firefox Mobile· Mozilla
95%
v < 112.0
Affected range stops below 112.0, so it looks safe — our inference, not a vendor statement
Focus· Mozilla
95%
v < 112v < 112.0
Affected range stops below 112, so it looks safe — our inference, not a vendor statement
Affected range stops below 112.0, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 102.10
Affected range stops below 102.10, so it looks safe — our inference, not a vendor statement

References (5)

Issue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1798219
Issue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1814597
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-13/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-14/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-15/

SSVC — Action Prioritization

SSVCPoCNot 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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