Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2019-11743

Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

Security Impact Summary

This vulnerability carries a LOW severity rating with a CVSS v3.1 score of 3.7, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, for affected systems. Impacting 3 products from mozilla, from mozilla, from mozilla organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-09-27T18:15:12.037

Last Modified

2025-11-25T17:50:16.803

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 3.7 (LOW)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 60.9.0	Yes
Application	mozilla	firefox	< 69.0	Yes
Application	mozilla	firefox_esr	< 68.1.0	Yes
Application	mozilla	thunderbird	< 60.9.0	Yes
Application	mozilla	thunderbird	< 68.1.0	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1560495 Issue Tracking, Permissions Required, Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/201911-07 ([email protected])
https://usn.ubuntu.com/4150-1/ ([email protected])
https://w3c.github.io/navigation-timing Exploit, Third Party Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-25/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-26/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-27/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-29/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-30/ Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mozilla.org/show_bug.cgi?id=1560495 Issue Tracking, Permissions Required, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201911-07 (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/4150-1/ (af854a3a-2127-422b-91ae-364da2661108)
https://w3c.github.io/navigation-timing Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-25/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-26/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-27/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-29/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-30/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mozilla's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.