CVE-2019-11761

Name: CVE-2019-11761
Creator: NVD / NIST
Published: 2020-01-08T20:15:12.78+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2019-11761 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

By using a form with a data URI it was possible to gain access to the privileged JSONView object that had been cloned into content. Impact from exposing this object appears to be minimal, however it was a bypass of existing defense in depth mechanisms. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.79%

51.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 70.0
Mozilla	Firefox Esr	< 68.2
Mozilla	Thunderbird	< 68.2
Canonical	Ubuntu Linux	16.04

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1561502Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202003-10Third Party Advisory
https://usn.ubuntu.com/4335-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-33/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-34/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-35/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1561502Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202003-10Third Party Advisory
https://usn.ubuntu.com/4335-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2019-33/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-34/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-35/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2019-11761?

How severe is CVE-2019-11761?

CVE-2019-11761 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2019-11761?

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-2019-11761?

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

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Source: NVD / NIST