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7.8

InstallBuilder for Qt Windows (versions prior to 20.7.0) installers look for plugins at a predictable location at initialization time, writable by non-admin users. While those plugins are not requi...

CVE-2020-3979 · published 6 years ago
Summary

InstallBuilder for Qt Windows (versions prior to 20.7.0) installers look for plugins at a predictable location at initialization time, writable by non-admin users. While those plugins are not required, they are loaded if present, which could allow an attacker to plant a malicious library which could...

What to do
  • Update installbuilder installbuilder to version 20.7.0 or later.
Affected software
VendorProductAffected versions
installbuilder installbuilder < 20.7.0
cpe:2.3:a:installbuilder:installbuilder:*:*:*:*:*:qt:*:*
Original advisory text
InstallBuilder for Qt Windows (versions prior to 20.7.0) installers look for plugins at a predictable location at initialization time, writable by non-admin users. While those plugins are not requi...
InstallBuilder for Qt Windows (versions prior to 20.7.0) installers look for plugins at a predictable location at initialization time, writable by non-admin users. While those plugins are not required, they are loaded if present, which could allow an attacker to plant a malicious library which could result in code execution with the security scope of the installer.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker full control (estimated)
Severity
7.8 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-427Uncontrolled Search Path Element
Timeline
Published18 Sep 2020
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2020-3979 · NVD
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