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CVE-2022-45410

MEDIUM
6.5
CVSS Score
Published: December 22, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 05:10 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

When a ServiceWorker intercepted a request with <code>FetchEvent</code>, the origin of the request was lost after the ServiceWorker took ownership of it. This had the effect of negating SameSite cookie protections. This was addressed in the spec and then in browsers. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Affected

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

Firefox· Mozilla
95%
v < 107
Affected range stops below 107, so it looks safe — our inference, not a vendor statement
Affected range stops below 107.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 102.5
Affected range stops below 102.5, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 102.5
Affected range stops below 102.5, so it looks safe — our inference, not a vendor statement

References (4)

Issue TrackingPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1658869
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-47/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-48/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-49/

SSVC — Action Prioritization

SSVCNo known exploitNot 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-862

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