Mozilla Firefox Vulnerability Allows Cross-Origin JavaScript Execution
CVE-2024-9394

7.5HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
1 October 2024

What is CVE-2024-9394?

A significant flaw has been identified in Mozilla Firefox and Thunderbird that allows an attacker to execute arbitrary JavaScript within the resource://devtools origin. Specifically, this vulnerability enables unauthorized access to cross-origin JSON content. On desktop clients, the Site Isolation feature restricts this access to 'same site' documents; however, on Android versions, attackers can achieve full cross-origin access, raising serious security concerns. Users are urged to update to the latest versions of Firefox and Thunderbird to mitigate associated risks.

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Affected Version(s)

Firefox < 131

Firefox ESR < 128.3

Firefox ESR < 115.16

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1918874
https://www.mozilla.org/security/advisories/mfsa2024-46/
https://www.mozilla.org/security/advisories/mfsa2024-47/

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Masato Kinugawa
JSON
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