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 (8)
Core 8
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/
Patch, Third Party Advisory x_refsource_misc
https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07c
Third Party Advisory x_refsource_misc
https://wpscan.com/vulnerability/10450
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/11/msg00004.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4784
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
Scores
CVSS v3
9.8
EPSS
0.1273
EPSS Percentile
94.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-754
Status
published
Products (5)
debian/debian_linux
10.0
fedoraproject/fedora
31
fedoraproject/fedora
32
fedoraproject/fedora
33
wordpress/wordpress
< 5.5.2
Published
Nov 02, 2020
Tracked Since
Feb 18, 2026