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VulnerabilityPublished Updated

CVE-2024-10460: The origin of an external protocol handler prompt could have been obscured using a data: URL within

Source GCVE Database

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Authoritative record:CVE-2024-10460· Medium 5.4

Not known to be exploited · CVSS 5.4 Medium · fixed in 132 : update affected systems when convenient.

Data as of 29 Oct 2026, 23:31 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.15.4
Patch
Available – fixed in 132, 128.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

AI-suggested

Mozilla has released official fixes for this vulnerability in Firefox 132, Firefox ESR 128.4, Thunderbird 132, and Thunderbird 128.4. Users and administrators should update affected products to these versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2024-10460 is a moderate severity vulnerability in Firefox and Thunderbird where the origin of an external protocol handler prompt could be obscured by using a data: URL within an iframe. This could confuse users about the true source of the prompt. The issue affects Firefox versions prior to 132 and Firefox ESR versions prior to 128.4, as well as Thunderbird versions prior to 128.4 and 132. Mozilla has fixed this vulnerability in Firefox 132 and Firefox ESR 128.4.

References

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