Arch Linux Security Advisory ASA-202011-3

Severity: Critical
Date    : 2020-11-03
CVE-ID  : CVE-2020-28032 CVE-2020-28033 CVE-2020-28034 CVE-2020-28035
          CVE-2020-28036 CVE-2020-28037 CVE-2020-28038 CVE-2020-28039
Package : wordpress
Type    : multiple issues
Remote  : Yes
Link    :


The package wordpress before version 5.5.3-1 is vulnerable to multiple
issues including arbitrary code execution, cross-site request forgery,
cross-site scripting, insufficient validation and privilege escalation.


Upgrade to 5.5.3-1.

# pacman -Syu "wordpress>=5.5.3-1"

The problems have been fixed upstream in version 5.5.3.




- CVE-2020-28032 (arbitrary code execution)

WordPress before 5.5.2 mishandles deserialization requests in wp-

- CVE-2020-28033 (insufficient validation)

WordPress before 5.5.2 mishandles embeds from disabled sites on a
multisite network, as demonstrated by allowing a spam embed.

- CVE-2020-28034 (cross-site scripting)

WordPress before 5.5.2 allows XSS associated with global variables.

- CVE-2020-28035 (privilege escalation)

WordPress before 5.5.2 allows attackers to gain privileges via XML-RPC.

- CVE-2020-28036 (privilege escalation)

wp-includes/class-wp-xmlrpc-server.php in WordPress before 5.5.2 allows
attackers to gain privileges by using XML-RPC to comment on a post.

- CVE-2020-28037 (arbitrary code execution)

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

- CVE-2020-28038 (cross-site scripting)

WordPress before 5.5.2 allows stored XSS via post slugs.

- CVE-2020-28039 (insufficient validation)

is_protected_meta in wp-includes/meta.php in WordPress before 5.5.2
allows arbitrary file deletion because it does not properly determine
whether a meta key is considered protected.

- CVE-2020-28040 (cross-site request forgery)

WordPress before 5.5.2 allows CSRF attacks that change a theme's
background image.


A remote attacker can bypass security restrictions to post spam, spoof
content, escalate privileges and execute arbitrary code.