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CVE-2022-28286

MEDIUM
5.4
CVSS Score
Published: December 22, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:38 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

Due to a layout change, iframe contents could have been rendered outside of its border. This could have led to user confusion or spoofing attacks. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.

Affected

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

Firefox· Mozilla
95%
v < 99
Affected range stops below 99, so it looks safe — our inference, not a vendor statement
Affected range stops below 99.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 91.8
Affected range stops below 91.8, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 91.8
Affected range stops below 91.8, so it looks safe — our inference, not a vendor statement

References (4)

ExploitIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1735265
ExploitVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-13/
ExploitVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-14/
ExploitVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-15/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

5.4MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1021

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