CVE-2024-10458Network attack vector

Cross-origin permission leak via lost feature-policy metadata

Published Oct 29, 2024 · Updated Nov 3, 2025

Permission leakage in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to inherit a trusted site's device permissions. When an object or embed load is upgraded to a document load, the browser fails to transfer feature-policy metadata, so cross-origin content is evaluated with the top origin's permissions. Exploitation requires a trusted page with granted camera, microphone, or geolocation access to embed attacker-controlled content; Thunderbird email reading disables scripting, limiting exposure to browser-like contexts.

CVSS severity7.5
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permission leakage in Mozilla Firefox, Firefox ESR, and Thunderbird allows remote attackers to inherit a trusted site's device permissions. When an object or embed load is upgraded to a document load, the browser fails to transfer feature-policy metadata, so cross-origin content is evaluated with the top origin's permissions. Exploitation requires a trusted page with granted camera, microphone, or geolocation access to embed attacker-controlled content; Thunderbird email reading disables scripting, limiting exposure to browser-like contexts.

The record

CVE
CVE-2024-10458
Published
Oct 29, 2024
Updated
Nov 3, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-281, T1125, T1123
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 <115.17; version=unspecified <128.4

Published CVSS scores

6.5CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-281Improper Preservation of Permissions
T1125Video Capture
T1123Audio Capture

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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