PT-2019-4608 · Mozilla+5 · Firefox Esr+7
Luigi Gubello
·
Published
2019-07-09
·
Updated
2025-09-29
·
CVE-2019-11730
CVSS v3.1
6.5
Medium
| Vector | AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 68
Firefox ESR versions prior to 60.8
Thunderbird versions prior to 60.8
Description
A vulnerability exists where opening a locally saved HTML file can allow access to 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 be uploaded to a server. This issue can be exploited in combination with a popular Android messaging app to read attachments the victim received from other correspondents.
Recommendations
For Firefox versions prior to 68, update to version 68 or later to resolve the issue.
For Firefox ESR versions prior to 60.8, update to version 60.8 or later to resolve the issue.
For Thunderbird versions prior to 60.8, update to version 60.8 or later to resolve the issue.
As a temporary workaround, consider avoiding opening locally saved HTML files from untrusted sources until a patch is available.
Restrict access to sensitive files and directories to minimize the risk of exploitation.
Exploit
Fix
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Firefox
Firefox Esr
Red Hat
Suse
Thunderbird
Ubuntu