CVE-2019-11751

What it is

Logging-related command line parameters are not properly sanitized when Firefox is launched by another program, such as when a user clicks on malicious links in a chat application. This can be used to write a log file to an arbitrary location such as the Windows 'Startup' folder. <br>*Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.

Exploit odds

1.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-09-27 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:13 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.1% in the next 30 days (EPSS).
• Severity: 8.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-09-27 18:15 UTC

Last modified

2026-06-17 02:13 UTC

Exploit probability

1.1% · EPSS, next 30 days

Weakness

CWE-88

Record status

Modified

Affected

• Mozilla Firefox < 69.0
• Mozilla Firefox Esr < 68.1.0

Attack profile CVSS 3.1 · 8.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-11751.md and follow it. Check whether this project is affected by CVE-2019-11751. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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