CVE-2022-34479

Q: How do I fix CVE-2022-34479?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2022-34479 being actively exploited?

Not that we know of. CVE-2022-34479 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.74% is the estimated probability that it will be exploited in the next 30 days. That is higher than 53% of all scored CVEs.

Q: How severe is CVE-2022-34479?

CVE-2022-34479 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2022-34479 affect?

Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), firefox (Debian), firefox (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

6.5

CVSS v3

NVD

Description

A malicious website that could create a popup could have resized the popup to overlay the address bar with its own content, resulting in potential user confusion or spoofing attacks. *This bug only affects Thunderbird for Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

CWE-451

How to fix

Remediation Available

thunderbirdAmazon

Fixed in:0:102.7.1-1.amzn2.0.1

thunderbird-debuginfoAmazon

Fixed in:0:102.7.1-1.amzn2.0.1

firefoxDebian

Fixed in:102.0-1CVE-2022-34479

firefoxUbuntu

Fixed in:102.0+build2-0ubuntu0.18.04.1USN-5504-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:102.0+build2-0ubuntu0.20.04.1USN-5504-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

thunderbirdUbuntu

Fixed in:1:91.11.0+build2-0ubuntu0.18.04.1USN-5512-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:1:91.11.0+build2-0ubuntu0.20.04.1USN-5512-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

Fixed in:1:91.11.0+build2-0ubuntu0.22.04.1USN-5512-1

Firefox Developer Edition (en-US)Windows application

Affected:102.0Fixed in:102.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:102.0Fixed in:102.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:91.11Fixed in:91.11Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:91.11Fixed in:91.11Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploit Intelligence

0.74%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Vendor Advisory4

Related Vulnerabilities

Other CWE-451 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38112	High	7.5	84%	KEV	Fix
CVE-2025-9491	High	7.8	69%	-	-
CVE-2024-43461	High	8.8	54%	KEV	Fix
CVE-2024-38197	Medium	6.5	16%	-	-
CVE-2026-0907	Critical	9.8	8.0%	-	Fix
CVE-2026-21527	High	6.5	8.0%	-	Fix

Common questions

How do I fix CVE-2022-34479?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2022-34479 being actively exploited?

Not that we know of. CVE-2022-34479 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.74% is the estimated probability that it will be exploited in the next 30 days. That is higher than 53% of all scored CVEs.

How severe is CVE-2022-34479?

CVE-2022-34479 has a CVSS v3 base score of 6.5, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2022-34479 affect?

Published advisories record a fix for thunderbird (Amazon), thunderbird-debuginfo (Amazon), firefox (Debian), firefox (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.