Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload…

Description

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.

Scores

EPSS (exploitation in 30 days)

1.8% · top 21% of all CVEs (7 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.

Weakness

• Cross-origin access to unload event attributes
• CWE-203 (opens in a new tab)All about CWE-203 and its CVEs

Affected products

• Mozilla · Firefox

  • affected unspecified – < 69

• Mozilla · Thunderbird

  • affected unspecified – < 68.1
  • affected unspecified – < 60.9

• Mozilla · Firefox ESR

  • affected unspecified – < 60.9
  • affected unspecified – < 68.1

References (13)

• https://bugzilla.mozilla.org/show_bug.cgi?id=1560495 (opens in a new tab)x_refsource_MISCx_transferred
• https://w3c.github.io/navigation-timing (opens in a new tab)x_refsource_MISCx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-25/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-27/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-26/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-29/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.mozilla.org/security/advisories/mfsa2019-30/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2019:2248 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2019:2249 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2019:2251 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2019:2260 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• USN-4150-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• GLSA-201911-07 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-11743](https://trackcve.app/badge/CVE-2019-11743.svg)](https://trackcve.app/cve/CVE-2019-11743)

Record last updated 4 Aug 2024, 23:03 UTC.