CVE-2022-45408Network attack vector

Fullscreen spoofing via reused windowName popups

Published Dec 22, 2022 · Updated Apr 15, 2025

Fullscreen notification bypass in Firefox before 107, Firefox ESR before 102.5, and Thunderbird before 102.5 allows remote attackers to spoof UI. A crafted sequence of popups reuses windowName so a window enters fullscreen without displaying the expected notification prompt. Opening attacker-controlled web content is required, and the hidden transition can mislead a user with browser-like or site-spoofing content.

CVSS severityUnavailable
Unscored
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Fullscreen notification bypass in Firefox before 107, Firefox ESR before 102.5, and Thunderbird before 102.5 allows remote attackers to spoof UI. A crafted sequence of popups reuses windowName so a window enters fullscreen without displaying the expected notification prompt. Opening attacker-controlled web content is required, and the hidden transition can mislead a user with browser-like or site-spoofing content.

The record

CVE
CVE-2022-45408
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <107

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <107
Mozilla · Thunderbirdversion=unspecified <102.5
Mozilla · Firefox ESRversion=unspecified <102.5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1036Masquerading

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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