CVE-2020-28037

CRITICAL

Wordpress < 5.5.2 - Improper Condition Check

Title source: rule

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)

[Patch, Third Party Advisory] https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07c

View Patch ZIP pw:eip

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2020/11/msg00004.html

[Release Notes, Vendor Advisory] https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/

[Third Party Advisory] https://wpscan.com/vulnerability/10450

[Third Party Advisory] https://www.debian.org/security/2020/dsa-4784

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/

Scores

CVSS v3 9.8

EPSS 0.1273

EPSS Percentile 93.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

CWE

CWE-754

Status published

Affected Products (5)

wordpress/wordpress < 5.5.2

fedoraproject/fedora

fedoraproject/fedora

fedoraproject/fedora

debian/debian_linux

Timeline

Published Nov 02, 2020

Tracked Since Feb 18, 2026