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Incorrect Permission Assignment for Critical Resource Affecting firefox-esr package, versions <60.3.0esr-1

Severity

 Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
2.27% (81st percentile)

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  • Snyk IDSNYK-ECHOLATEST-FIREFOXESR-18169155
  • published22 Jul 2026
  • disclosed28 Feb 2019
Report a new vulnerability Found a mistake?

Introduced: 28 Feb 2019

CVE-2018-12396  (opens in a new tab)
CWE-732  (opens in a new tab)

How to fix?

Upgrade Echo:latest firefox-esr to version 60.3.0esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites where content scripts should not be run. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.