CVE-2024-10460Public exploitNetwork attack vector

UI spoofing via hidden external-protocol prompt origin

Published Oct 29, 2024 · Updated Nov 3, 2025

Origin validation error in Firefox before 132, Firefox ESR before 128.4, and Thunderbird before 132 allows remote attackers to spoof content. The external-protocol dialog's principal display logic in permissionDialog.js omits the initiating origin when a data: URL is loaded in an iframe over another site. The attack requires a user to open the crafted page and click its link, enabling a deceptive external-application prompt without direct code execution or data access.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Firefox before 132, Firefox ESR before 128.4, and Thunderbird before 132 allows remote attackers to spoof content. The external-protocol dialog's principal display logic in permissionDialog.js omits the initiating origin when a data: URL is loaded in an iframe over another site. The attack requires a user to open the crafted page and click its link, enabling a deceptive external-application prompt without direct code execution or data access.

The record

CVE
CVE-2024-10460
Published
Oct 29, 2024
Updated
Nov 3, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-346
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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 <132

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <132
Mozilla · Thunderbirdversion=unspecified <128.4; version=unspecified <132
Mozilla · Firefox ESRversion=unspecified <128.4

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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-346Origin Validation Error

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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