CVE-2022-1529

Q: How do I fix CVE-2022-1529?

Published advisories record a fix for 7 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2022-1529 being actively exploited?

Not that we know of. CVE-2022-1529 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 17.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 97% of all scored CVEs.

Q: How severe is CVE-2022-1529?

CVE-2022-1529 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2022-1529 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), thunderbird (Ubuntu), DeveloperEdition (Windows application), and 3 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 97th pctl

8.8

CVSS v3

NVD

Description

An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype pollution and ultimately attacker-controlled JavaScript executing in the privileged parent process. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

CWE-1321

How to fix

Remediation Available

firefoxDebian

Fixed in:100.0.2-1CVE-2022-1529

firefoxUbuntu

Fixed in:100.0.2+build1-0ubuntu0.18.04.1USN-5434-1

Fixed in:100.0.2+build1-0ubuntu0.20.04.1USN-5434-1

thunderbirdUbuntu

Fixed in:1:91.9.1+build1-0ubuntu0.18.04.1USN-5435-1

Fixed in:1:91.9.1+build1-0ubuntu0.20.04.1USN-5435-1

Fixed in:1:91.9.1+build1-0ubuntu0.22.04.1USN-5435-1

DeveloperEditionWindows application

Affected:100.3.0Fixed in:100.3.0Mozilla

Affected:100.0.2Fixed in:100.0.2Mozilla

Mozilla Firefox (en-US)Windows application

Affected:100.3.0Fixed in:100.3.0Mozilla

Affected:100.0.2Fixed in:100.0.2Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:91.9.1Fixed in:91.9.1Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:91.9.1Fixed in:91.9.1Mozilla

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

17.10%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-1321 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0230	Critical	9.8	97%	-	-
CVE-2019-11358	Medium	6.1	87%	-	Fix
CVE-2020-7774	High	7.3	69%	-	Fix
CVE-2022-24760	Critical	10.0	49%	-	Fix
CVE-2022-39396	Critical	9.8	39%	-	Fix
CVE-2022-2564	Critical	9.8	33%	-	Fix

Common questions

How do I fix CVE-2022-1529?

Published advisories record a fix for 7 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2022-1529 being actively exploited?

Not that we know of. CVE-2022-1529 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 17.1% is the estimated probability that it will be exploited in the next 30 days. That is higher than 97% of all scored CVEs.

How severe is CVE-2022-1529?

CVE-2022-1529 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2022-1529 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), thunderbird (Ubuntu), DeveloperEdition (Windows application), and 3 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-16.