Same-Origin Policy Bypass in Firefox Notifications Component
CVE-2025-13017

8.1HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
11 November 2025

What is CVE-2025-13017?

A security vulnerability in the Firefox web browser has been identified that allows for a bypass of the same-origin policy specifically in the DOM Notifications component. This issue affects versions of Firefox prior to 145 and Firefox Extended Support Release (ESR) versions prior to 140.5. Exploitation of this vulnerability could allow malicious websites to access sensitive information across different origins, potentially compromising user privacy and security.

Affected Version(s)

Firefox < 145

Firefox ESR < 140.5

Thunderbird < 145

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1980904
https://www.mozilla.org/security/advisories/mfsa2025-87/
https://www.mozilla.org/security/advisories/mfsa2025-88/

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mochammad Nosa Shandy Prastyo
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