CVE-2019-11765

Name: CVE-2019-11765
Creator: NVD / NIST
Published: 2020-01-08T21:15:10.63+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.84%

Last modified Jun 17, 2026

CVE-2019-11765 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A compromised content process could send a message to the parent process that would cause the 'Click to Play' permission prompt to be shown. However, due to lack of validation from the parent process, if the user accepted the permission request an attacker-controlled permission would be granted rather than the 'Click to Play' permission. EPSS estimates a 0.84% chance of exploitation in the next 30 days.

Description

A compromised content process could send a message to the parent process that would cause the 'Click to Play' permission prompt to be shown. However, due to lack of validation from the parent process, if the user accepted the permission request an attacker-controlled permission would be granted rather than the 'Click to Play' permission. This vulnerability affects Firefox < 70.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS Probability

0.84%

53.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-276

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 70.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1562582Permissions Required
https://www.mozilla.org/security/advisories/mfsa2019-34/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1562582Permissions Required
https://www.mozilla.org/security/advisories/mfsa2019-34/Vendor Advisory

Timeline

Published: Jan 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-11765?

How severe is CVE-2019-11765?

CVE-2019-11765 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.84% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11765?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-11765?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST