CVE-2020-28039 Path traversal in n/a

What is CVE-2020-28039?

CVE-2020-28039 is a critical path traversal vulnerability in Canonical Ubuntu Linux, published on 31 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2020-28039?

2 open source packages ship an affected version, including wordpress and wordpress-multisite. It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Wordpress Wordpress.

How do I fix CVE-2020-28039?

Upgrade wordpress to 5.5.2 or later.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-28039 being exploited?

There is no known exploitation of CVE-2020-28039 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-wordpress-2020-28039, BIT-wordpress-multisite-2020-28039, DEBIAN-CVE-2020-28039, GHSA-65h5-8qpr-9m3v, UBUNTU-CVE-2020-28039.