CVE-2022-34483Network attack vector

Code execution via truncated drag-and-drop filename

Published Dec 22, 2022 · Updated Apr 15, 2025

Filename handling in Mozilla Firefox before 102 allows remote attackers to create a file with an executable extension through image drag-and-drop. The DOM drag-and-drop file handler truncates crafted image filenames longer than 128 characters, leaving an executable extension in the saved name. Exploitation requires a user to visit a malicious page, drag its image to the filesystem, and then open the resulting file, which runs code with that user's privileges.

CVSS severity8.8
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Filename handling in Mozilla Firefox before 102 allows remote attackers to create a file with an executable extension through image drag-and-drop. The DOM drag-and-drop file handler truncates crafted image filenames longer than 128 characters, leaving an executable extension in the saved name. Exploitation requires a user to visit a malicious page, drag its image to the filesystem, and then open the resulting file, which runs code with that user's privileges.

The record

CVE
CVE-2022-34483
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-434, T1204.002
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

Published CVSS scores

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

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1204.002User Execution Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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