CVE-2019-11730
Description
A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
How to fix CVE-2019-11730
To remediate CVE-2019-11730, upgrade the affected package to a fixed version below.
- —upgrade to 60.8.0esr-1 or later
- —upgrade to 1:60.8.0-1 or later
Is CVE-2019-11730 being exploited?
Moderate — EPSS is 18.4%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 60.8.0esr-1
- from 0, < 1:60.8.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |