CVE-2022-1802

HIGH

8.8

CVSS Score

Published: December 22, 2022 at 12:00 AM UTC

Updated: June 17, 2026 at 04:23 AM UTC

3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR· also runs on 1 platform

Using Firefox ESR by Mozilla?

Get instant alerts when new vulnerabilities affect Firefox ESR - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH8.8

Exploit prediction

EPSS 28%

SSVC

PoC

Description

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

Affected

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

Firefox · Mozilla

95%

v < 100.0.2v < 100.3.0

Affected range stops below 100.0.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 100.3.0, so it looks safe — our inference, not a vendor statement

google-android (environment)

Firefox ESR · Mozilla

95%

v < 91.9.1

Affected range stops below 91.9.1, so it looks safe — our inference, not a vendor statement

Thunderbird · Mozilla

95%

v < 91.9.1

Affected range stops below 91.9.1, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Android · Google

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Issue TrackingPermissions RequiredVendor Advisory

Source: [email protected]

https://bugzilla.mozilla.org/show_bug.cgi?id=1770137

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2022-19/

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

CWE-1321

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card