CVE-2019-12383

Name: CVE-2019-12383
Creator: NVD / NIST
Published: 2019-05-28T03:29:00.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 2.16%

Last modified Jun 17, 2026

CVE-2019-12383 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a "Don't send my language" setting.. EPSS estimates a 2.16% chance of exploitation in the next 30 days.

Description

Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a "Don't send my language" setting.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS Probability

2.16%

79.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Torproject	Tor Browser	< 8.0.1

References

http://www.securityfocus.com/bid/108484Broken Link, Third Party Advisory, VDB Entry
https://gitweb.torproject.org/tor-browser.git/commit/?id=cbb04b72c68272c2de42f157d40cd7d29a6b7b55Mailing List, Patch, Third Party Advisory
https://hackerone.com/reports/282748Issue Tracking, Third Party Advisory
https://trac.torproject.org/projects/tor/ticket/24056Vendor Advisory
http://www.securityfocus.com/bid/108484Broken Link, Third Party Advisory, VDB Entry
https://gitweb.torproject.org/tor-browser.git/commit/?id=cbb04b72c68272c2de42f157d40cd7d29a6b7b55Mailing List, Patch, Third Party Advisory
https://hackerone.com/reports/282748Issue Tracking, Third Party Advisory
https://trac.torproject.org/projects/tor/ticket/24056Vendor Advisory

Timeline

Published: May 28, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12383?

How severe is CVE-2019-12383?

CVE-2019-12383 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 2.16% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12383?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-12383?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST