BaseFortify

Publication date: 2025-10-14

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description

Starting in Thunderbird 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability was fixed in Firefox 144 and Thunderbird 144.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-10-14

Last Modified

2026-04-13

Generated

2026-07-06

AI Q&A

2025-10-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-11719

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows	*
mozilla	thunderbird	to 140.0 (inc)
mozilla	firefox	From 60.9.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability involves the use of the native messaging API by web extensions on Windows in Firefox versions before 144 and Thunderbird versions before 144. It can cause crashes due to use-after-free memory corruption, which is a type of memory safety bug where the program accesses memory after it has been freed, potentially leading to instability or exploitation. [1]

Impact Analysis

The vulnerability can cause crashes in Firefox and Thunderbird, and because it involves memory corruption, it could potentially be exploited to execute arbitrary code remotely. This means an attacker could take control of the affected system or cause denial of service by crashing the application. [1]

Mitigation Strategies

To mitigate this vulnerability, update Firefox and Thunderbird to version 144 or later, as the issue was fixed starting in Firefox 144 and Thunderbird 144. [1]

Hi! I’m here to help you understand CVE-2025-11719. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70