6.5

CVE-2019-11747: mozilla firefox Improper Initialization

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2019-11747DEBIAN-CVE-2019-11747
Published 27-09-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-11747 is a medium (CVSS 6.5) Improper Initialization vulnerability in mozilla firefox. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
1.19%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 8
MGASA-2019-0268OPENSUSE-SU-2019:2251-1OPENSUSE-SU-2019:2260-1OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1RHSA-2019:2663

Timeline

  1. 27-09-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

The "Forget about this site" feature in the History pane is intended to remove all saved user data that indicates a user has visited a site. This includes removing any HTTP Strict Transport Security (HSTS) settings received from sites that use it. Due to a bug, sites on the pre-load list also have their HSTS setting removed. On the next visit to that site if the user specifies an http: URL rather than secure https: they will not be protected by the pre-loaded HSTS setting. After that visit the site's HSTS setting will be restored. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.19%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

0.00 pp

From 1.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.19%

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

Ubuntu3 products
  • firefox< 69.0+build2-0ubuntu0.16.04.4 | < 69.0+build2-0ubuntu0.18.04.1
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
Mozilla2 products
Debian1 product
  • firefox-esr< 68.1.0esr-1

3 vendors · 6 products

References

10 links