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CVE-2022-22763

HIGH
8.8
CVSS Score
Published: December 22, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:28 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
HIGH8.8
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

When a worker is shutdown, it was possible to cause script to run late in the lifecycle, at a point after where it should not be possible. This vulnerability affects Firefox < 96, Thunderbird < 91.6, and Firefox ESR < 91.6.

Affected

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

Firefox· Mozilla
95%
v < 96
Affected range stops below 96, so it looks safe — our inference, not a vendor statement
Affected range stops below 96.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 91.6
Affected range stops below 91.6, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 91.6
Affected range stops below 91.6, so it looks safe — our inference, not a vendor statement

References (4)

Issue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1740534
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-01/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-05/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2022-06/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

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

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-362

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