CVE-2022-34468Public exploitNetwork attack vector

Script execution via incorrect sandbox flag source

Published Dec 22, 2022 · Updated Apr 15, 2025

Sandbox bypass in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to execute script in restricted iframes. OnLinkClickSync copies sandbox flags from the browsing context instead of the initiating document, so a retargeted javascript link loses the CSP script restriction. Exploitation requires a user click and a script-capable same-origin target; Thunderbird mail reading disables scripting.

CVSS severity8.8
High
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox bypass in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to execute script in restricted iframes. OnLinkClickSync copies sandbox flags from the browsing context instead of the initiating document, so a retargeted javascript link loses the CSP script restriction. Exploitation requires a user click and a script-capable same-origin target; Thunderbird mail reading disables scripting.

The record

CVE
CVE-2022-34468
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-829, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <102

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <102
Mozilla · Thunderbirdversion=unspecified <102; version=unspecified <91.11
Mozilla · Firefox ESRversion=unspecified <91.11

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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