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CVE-2022-34479

MEDIUM
6.5
CVSS Score
Published: December 22, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:50 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR· also runs on 1 platform

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%
SSVC
PoC

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. <br>*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.

Affected

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

Firefox· Mozilla
95%
v < 102
Affected range stops below 102, so it looks safe — our inference, not a vendor statement
Affected range stops below 102.0, so it looks safe — our inference, not a vendor statement
linux-linux-kernel (environment)
Firefox ESR· Mozilla
95%
v < 91.11
Affected range stops below 91.11, so it looks safe — our inference, not a vendor statement
linux-linux-kernel (environment)
Thunderbird· Mozilla
95%
v < 102v < 91.11
Affected range stops below 102, so it looks safe — our inference, not a vendor statement
Affected range stops below 91.11, so it looks safe — our inference, not a vendor statement
linux-linux-kernel (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 TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1745595
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-24/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-25/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-26/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-451

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