CVE-2021-29447

Description

Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.

How to fix CVE-2021-29447

To remediate CVE-2021-29447, upgrade the affected package to a fixed version below.

—upgrade to 5.7.1 or later
—upgrade to 5.7.1 or later
—upgrade to 5.7.1+dfsg1-1 or later
—upgrade to 4.7.20+dfsg-1+deb9u1 or later
—upgrade to 5.0.12+dfsg1-0+deb10u1 or later

Is CVE-2021-29447 being exploited?

Likely — EPSS is 90.8%, placing CVE-2021-29447 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.

Affected packages (5)

>= 5.6.0, < 5.7.1
>= 5.6.0, < 5.7.1
from 0, < 5.7.1+dfsg1-1
from 0, < 4.7.20+dfsg-1+deb9u1
from 0, < 5.0.12+dfsg1-0+deb10u1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N