4.3

CVE-2019-12383: torproject tor_browser Observable Discrepancy

CVSS: 4.3v3.1MediumModified
AliasesDEBIAN-CVE-2019-12383
Published 28-05-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-12383 is a medium (CVSS 4.3) Observable Discrepancy vulnerability in torproject tor_browser. EPSS estimates a 2.16% chance of exploitation in the next 30 days, higher than 81.9% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (NVD)
EPSS score
2.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 28-05-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.16%

Chance of exploitation in the next 30 days

Percentile

82%

Versus all other CVEs

30-day change

0.00 pp

From 2.16% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • firefox-esrAll versions (No fix recorded)
Torproject1 product

2 vendors · 2 products

References

5 links