CVE-2020-6797

Name: CVE-2020-6797
Creator: NVD / NIST
Published: 2020-03-02T05:15:13.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.44%

Last modified Jun 17, 2026

CVE-2020-6797 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. By downloading a file with the .fileloc extension, a semi-privileged extension could launch an arbitrary application on the user's computer. The attacker is restricted as they are unable to download non-quarantined files or supply command line arguments to the application, limiting the impact. EPSS estimates a 1.44% chance of exploitation in the next 30 days.

Description

By downloading a file with the .fileloc extension, a semi-privileged extension could launch an arbitrary application on the user's computer. The attacker is restricted as they are unable to download non-quarantined files or supply command line arguments to the application, limiting the impact. Note: this issue only occurs on Mac OSX. Other operating systems are unaffected. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

1.44%

69.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 73.0
Mozilla	Firefox Esr	< 68.5.0
Mozilla	Thunderbird	< 68.5.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1596668Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202003-02Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-05/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-06/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-07/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1596668Issue Tracking, Permissions Required
https://security.gentoo.org/glsa/202003-02Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-05/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-06/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-07/Vendor Advisory

Timeline

Published: Mar 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6797?

How severe is CVE-2020-6797?

CVE-2020-6797 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.44% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6797?

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-2020-6797?

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

Scan your code now

Source: NVD / NIST