CVE-2019-11730

MEDIUM

Firefox < 68.0 and Firefox ESR < 60.8 - Unauthenticated Local File Access via File URI

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-11730. PoCs published by lihuaiqiu.

AI-analyzed exploit summary This repository contains a functional PHP script demonstrating a file upload vulnerability leading to RCE, XSS, and DoS. The script allows arbitrary file uploads via POST requests, saving files in directories named after the victim's IP address.

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.

Exploits (1)

nomisec WORKING POC
by lihuaiqiu · poc
https://github.com/lihuaiqiu/CVE-2019-11730

This repository contains a functional PHP script demonstrating a file upload vulnerability leading to RCE, XSS, and DoS. The script allows arbitrary file uploads via POST requests, saving files in directories named after the victim's IP address.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: PHP-based web applications (version not specified)
No auth needed
Prerequisites: Access to a vulnerable PHP web application with file upload functionality
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (13)

Core 13
Core References
Issue Tracking, Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1558299
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201908-12
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201908-20
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html

Scores

CVSS v3 6.5
EPSS 0.1841
EPSS Percentile 95.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Details

Status published
Products (7)
debian/debian_linux 8.0
mozilla/firefox < 68.0
mozilla/firefox_esr < 60.8
mozilla/thunderbird < 60.8
opensuse/leap 15.0
opensuse/leap 15.1
suse/package_hub
Published Jul 23, 2019
Tracked Since Feb 18, 2026