CVE-2018-5157

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 52.8 Firefox versions prior to 60

Description The issue allows a malicious site to bypass same-origin protections for the PDF viewer, potentially intercepting messages meant for the viewer. This could enable the site to retrieve PDF files restricted to viewing by an authenticated user on a third-party website. The vulnerability is also described as being due to insufficient input validation in the Capture Handler component of Firefox ESR and Firefox browsers, which could allow a remote attacker to elevate their privileges.

Recommendations For Firefox ESR versions prior to 52.8, update to version 52.8 or later. For Firefox versions prior to 60, update to version 60 or later.