CVE-2023-4574Network attack vector

Application crash via duplicate IPC callback destruction

Published Sep 11, 2023 · Updated Dec 18, 2025

Use-after-free in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to crash the application via crafted content. ColorPickerShownCallback permits duplicate callbacks for one IPC color-picker request, then destroys all copies when one callback completes. User interaction with browser-like content is required; affected releases are Firefox before 117 and Firefox ESR or Thunderbird before 102.15 or 115.2.

CVSS severity6.5
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to crash the application via crafted content. ColorPickerShownCallback permits duplicate callbacks for one IPC color-picker request, then destroys all copies when one callback completes. User interaction with browser-like content is required; affected releases are Firefox before 117 and Firefox ESR or Thunderbird before 102.15 or 115.2.

The record

CVE
CVE-2023-4574
Published
Sep 11, 2023
Updated
Dec 18, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 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 <117

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <117
Mozilla · Thunderbirdversion=unspecified <102.15; version=unspecified <115.2
Mozilla · Firefox ESRversion=unspecified <102.15; version=unspecified <115.2

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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 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-416Use After Free

Public exploit references

No public exploit references are available in this record.

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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