CVE-2020-28037
published 2020-11-02CVE-2020-28037: 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…
PriorityP260critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
7.74%
93.9th percentile
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).
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | wordpress | < wordpress 5.5.3+dfsg1-1 (bookworm) | wordpress 5.5.3+dfsg1-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| wordpress | wordpress | < 5.5.2 | 5.5.2 |
| wordpress | wordpress | >= 0 < 5.5.3+dfsg1-1 | 5.5.3+dfsg1-1 |
| wordpress | wordpress | >= 0 < 5.5.3+dfsg1-1 | 5.5.3+dfsg1-1 |
| wordpress | wordpress | >= 0 < 5.5.3+dfsg1-1 | 5.5.3+dfsg1-1 |
| wordpress | wordpress | >= 0 < 5.5.3+dfsg1-1 | 5.5.3+dfsg1-1 |
Detection & IOCsextracted from sources · hover to see the quote
- →Monitor for unexpected access to the WordPress installation endpoint (wp-admin/install.php) on already-installed WordPress instances, which may indicate an attacker attempting to trigger a new installation via the is_blog_installed() logic flaw. ↗
- →The upstream patch commit 2ca15d1e5ce70493c5c0c096ca0c76503d6da07c in the WordPress GitHub repository can be used to diff the vulnerable vs. patched is_blog_installed() logic for building precise detection rules. ↗
- →WPScan vulnerability ID 10450 can be used to cross-reference scanner findings for this specific CVE. ↗
- ·Vulnerability only affects WordPress installations running versions prior to 5.5.2; instances already patched to 5.5.2 or later (or Debian package 5.5.3+dfsg1-1) are not affected. ↗
- ·The attack vector requires the attacker to be able to reach the WordPress installation routine; network-level controls restricting access to wp-admin/install.php on production sites reduce exposure. ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
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GHSA
GHSA-h2pj-w259-mfcv: is_blog_installed in wp-includes/functions
ghsa_unreviewed·2022-05-24
CVE-2020-28037 [CRITICAL] CWE-20 GHSA-h2pj-w259-mfcv: is_blog_installed in wp-includes/functions
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).
OSV
CVE-2020-28037: is_blog_installed in wp-includes/functions
osv·2020-11-02·CVSS 9.8
CVE-2020-28037 [CRITICAL] CVE-2020-28037: is_blog_installed in wp-includes/functions
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).
Debian
CVE-2020-28037: wordpress - is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 imprope...
vendor_debian·2020·CVSS 9.8
CVE-2020-28037 [CRITICAL] CVE-2020-28037: wordpress - is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 imprope...
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).
Scope: local
bookworm: resolved (fixed in 5.5.3+dfsg1-1)
bullseye: resolved (fixed in 5.5.3+dfsg1-1)
forky: resolved (fixed in 5.5.3+dfsg1-1)
sid: resolved (fixed in 5.5.3+dfsg1-1)
trixie: resolved (fixed in 5.5.3+dfsg1-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-28037 wordpress: DoS attack could lead to RCE [fedora-all]
bugzilla·2020-11-05·CVSS 9.8
CVE-2020-28037 [CRITICAL] CVE-2020-28037 wordpress: DoS attack could lead to RCE [fedora-all]
CVE-2020-28037 wordpress: DoS attack could lead to RCE [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora
Bugzilla
CVE-2020-28037 wordpress: DoS attack could lead to RCE [epel-all]
bugzilla·2020-11-05·CVSS 9.8
CVE-2020-28037 [CRITICAL] CVE-2020-28037 wordpress: DoS attack could lead to RCE [epel-all]
CVE-2020-28037 wordpress: DoS attack could lead to RCE [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora EPE
Bugzilla
CVE-2020-28037 wordpress: DoS attack could lead to RCE
bugzilla·2020-11-05·CVSS 9.8
CVE-2020-28037 [CRITICAL] CVE-2020-28037 wordpress: DoS attack could lead to RCE
CVE-2020-28037 wordpress: DoS attack could lead to RCE
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:
https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/
https://wpscan.com/vulnerability/10450
Upstream patch:
https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07c
Discussion:
Created wordpress tracking bugs for this issue:
Affects: epel-all [bug 1894971]
Affects: fedora-all [bug 1894970]
---
This CVE Bugzilla entry is for community support informational purposes
https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07chttps://lists.debian.org/debian-lts-announce/2020/11/msg00004.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/https://wpscan.com/vulnerability/10450https://www.debian.org/security/2020/dsa-4784https://github.com/WordPress/wordpress-develop/commit/2ca15d1e5ce70493c5c0c096ca0c76503d6da07chttps://lists.debian.org/debian-lts-announce/2020/11/msg00004.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/https://wpscan.com/vulnerability/10450https://www.debian.org/security/2020/dsa-4784
2020-11-02
Published