CVE-2022-3155Public exploit

Application execution via missing quarantine attribute

Published Dec 22, 2022 · Updated Apr 15, 2025

Gatekeeper bypass in Mozilla Thunderbird before 102.3 allows remote attackers to deliver applications that launch without a warning on macOS. The macOS application bundle omitted LSFileQuarantineEnabled from Info.plist, so saved attachments lacked the com.apple.quarantine attribute required for Gatekeeper checks. A user must save or open an application attachment and then choose to run it; the application then executes without signature or notarization enforcement.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Gatekeeper bypass in Mozilla Thunderbird before 102.3 allows remote attackers to deliver applications that launch without a warning on macOS. The macOS application bundle omitted LSFileQuarantineEnabled from Info.plist, so saved attachments lacked the com.apple.quarantine attribute required for Gatekeeper checks. A user must save or open an application attachment and then choose to run it; the application then executes without signature or notarization enforcement.

The record

CVE
CVE-2022-3155
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Thunderbird
Classifications
CWE-276, T1553.001, T1204.002
Attack vector
local
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 <102.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Mozilla · Thunderbirdversion=unspecified <102.3

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1553.001Subvert Trust Controls: Gatekeeper Bypass
T1204.002User Execution: Malicious File

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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