Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2020-12393

7.8 · HIGH

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website.

Published May 26, 2020CWE-78EPSS 1.01%

Overview

CVE-2020-12393 is a high-severity vulnerability. It was published on May 26, 2020 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in command injection and arbitrary command execution. *Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugzilla.mozilla.org/show_bug.cgi?id=1615471Refwww.mozilla.org/security/advisories/mfsa2020-16/Refwww.mozilla.org/security/advisories/mfsa2020-17/Refwww.mozilla.org/security/advisories/mfsa2020-18/Refbugzilla.mozilla.org/show_bug.cgi?id=1615471Refwww.mozilla.org/security/advisories/mfsa2020-16/Refwww.mozilla.org/security/advisories/mfsa2020-17/Refwww.mozilla.org/security/advisories/mfsa2020-18/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-12393?

CVE-2020-12393 is a high-severity vulnerability. It was published on May 26, 2020 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2020-12393?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-12393?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-12393?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-12393 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2020

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999