BaseFortify

Publication date: 2025-11-11

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description

Same-origin policy bypass in the DOM: Notifications component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-11-11

Last Modified

2026-04-13

Generated

2026-07-07

AI Q&A

2025-11-11

EPSS Evaluated

2026-07-06

NVD

CVE-2025-13017

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 140.5.0 (exc)
mozilla	firefox	to 145.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-942	The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.

Attack-Flow Graph

Executive Summary

This vulnerability is a same-origin policy bypass in the DOM Notifications component affecting Firefox versions below 145 and Firefox ESR below 140.5. It allows an attacker to bypass the browser's security restrictions that normally prevent web pages from accessing data from different origins.

Impact Analysis

This vulnerability can allow malicious websites to access or manipulate information from other websites or origins without proper authorization, potentially leading to data leakage, privacy violations, or unauthorized actions within the browser.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 145 or later, or Firefox ESR to version 140.5 or later.

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