WordPress Core < 5.5.2 - Misconfiguration That Allows Trigger of New Installation

Improper Authorization
CVE CVE-2020-28037
CVSS Medium (4.8)
Publicly Published October 29, 2020
Last Updated January 22, 2024
Researcher Omar Ganiev
Description

is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 improperly determines whether WordPress is already installed, which might allow an attacker to perform a new installation, leading to remote code execution (as well as a denial of service for the old installation).

References

1 affected software package

Software Type Core
Software Slug wordpress (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.7
  • 3.7 - 3.7.34
  • 3.8 - 3.8.34
  • 3.9 - 3.9.32
  • 4.0 - 4.0.31
  • 4.1 - 4.1.31
  • 4.2 - 4.2.28
  • 4.3 - 4.3.24
  • 4.4 - 4.4.23
  • 4.5 - 4.5.22
  • 4.6 - 4.6.19
  • 4.7 - 4.7.18
  • 4.8 - 4.8.14
  • 4.9 - 4.9.15
  • 5.0 - 5.0.10
  • 5.1 - 5.1.6
  • 5.2 - 5.2.7
  • 5.3 - 5.3.4
  • 5.4 - 5.4.2
  • 5.5 - 5.5.1
Patched Version
  • 3.7.35
  • 3.8.35
  • 3.9.33
  • 4.0.32
  • 4.1.32
  • 4.2.29
  • 4.3.25
  • 4.4.24
  • 4.5.23
  • 4.6.20
  • 4.7.19
  • 4.8.15
  • 4.9.16
  • 5.0.11
  • 5.1.7
  • 5.2.8
  • 5.3.5
  • 5.4.3
  • 5.5.2
This record contains material that is subject to copyright

Copyright 2012-2026 Defiant Inc.
License: Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy. License Detail.