VulnerabilityPublished 29 Oct 2024Updated 3 Nov 2025

CVE-2024-10463: Mozilla Firefox · Cross Origin Video Frame Leak

Affects Mozilla FirefoxSource CVE Database V5

Not known to be exploited · CVSS 7.5 High · fixed in 132 : patch Mozilla Firefox soon.

Data as of 26 Oct 2026, 12:29 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 132, 128.4, 115.17

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 29 Oct 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Mozilla Firefox to 132, 128.4 or 115.17.

Affected software

Product	Affected	Fixed in
Mozilla Firefox	Affected <132 <128.4 <115.17	Fixed in 132 128.4 115.17

AI-suggested

To mitigate CVE-2024-10463, European organizations should: 1) Immediately inventory and identify all Firefox and Thunderbird installations, focusing on versions prior to the fixed releases (Firefox <132, ESR <128.4 and <115.17, Thunderbird <128.4 and <132). 3) Until patches are available, consider disabling or restricting features that allow cross-origin video frame access, such as disabling certain web APIs or sandboxing browser processes. 4) Employ network monitoring and intrusion detection systems to identify unusual cross-origin video frame requests or data exfiltration attempts. 5) Educate users about the risks of visiting untrusted websites that might exploit this vulnerability. 6) For high-security environments, consider using alternative browsers or email clients not affected by this vulnerability until patches are deployed. 7) Implement Content Security Policy (CSP) headers to restrict cross-origin resource sharing and reduce attack surface. 8) Regularly review browser configurations and extensions that might increase exposure to cross-origin attacks.

Description

Video frames could have been leaked between origins in some situations. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Firefox ESR < 115.17, Thunderbird < 128.4, and Thunderbird < 132.

Impact

For European organizations, the primary impact of CVE-2024-10463 is the potential unauthorized disclosure of sensitive video content accessed through Firefox or Thunderbird. This could include confidential video conferences, streamed media, or other proprietary visual data. The breach of confidentiality could lead to exposure of intellectual property, personal data under GDPR, or sensitive communications, resulting in regulatory penalties and reputational damage. Since the vulnerability does not affect integrity or availability, operational disruption is unlikely; however, the silent nature of the exploit increases the risk of unnoticed data leakage. Organizations in sectors such as finance, government, healthcare, and critical infrastructure that rely heavily on secure communications and video conferencing tools are particularly vulnerable. The ease of exploitation without user interaction or privileges means attackers can automate attacks at scale, increasing the threat surface. Additionally, the cross-origin nature of the vulnerability could be leveraged in complex multi-origin web environments common in enterprise settings, amplifying risk.

CWE-203Observable Discrepancy (opens in a new tab)
Base weakness
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
Architecture and Design · Separation of Privilege
Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
Implementation
Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended).
OWASP Cheat Sheets
Error Handling (opens in a new tab)
Logging (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.4 (opens in a new tab)
V14.3.3 (opens in a new tab)
V7.3.3 (opens in a new tab)
Attack patterns
Black Box Reverse Engineering (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Nov 2025, 23:13 UTC

WeaknessesCWE-203

Technical details

References

Community reviews

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