CVE-2024-10463Network attack vector

Cross-origin video disclosure via early principal change

Published Oct 29, 2024 · Updated Nov 3, 2025

Cross-origin data exposure in Firefox, Firefox ESR, and Thunderbird allows remote attackers to read video frames from another origin. VideoFrameContainer::SetCurrentFrames changes the principal handle before all frames with the previous principal are flushed when old and replacement frame sets overlap. A victim must load attacker-controlled content while video from multiple origins is present; the consequence is limited to video-content disclosure.

CVSS severity6.5
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-origin data exposure in Firefox, Firefox ESR, and Thunderbird allows remote attackers to read video frames from another origin. VideoFrameContainer::SetCurrentFrames changes the principal handle before all frames with the previous principal are flushed when old and replacement frame sets overlap. A victim must load attacker-controlled content while video from multiple origins is present; the consequence is limited to video-content disclosure.

The record

CVE
CVE-2024-10463
Published
Oct 29, 2024
Updated
Nov 3, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-203
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=0 <132
  2. Affected versionversion=unspecified <132

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <132; version=unspecified <132
Mozilla · Thunderbirdversion=0 <128.4; version=0 <132; version=unspecified <128.4; version=unspecified <132
Mozilla · Firefox ESRversion=0 <115.7; version=0 <128.4; version=unspecified <115.17; version=unspecified <128.4

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-203Observable Discrepancy

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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