WordPress security changelog
HIGH CVE-2021-29447 Modified

a successful XXE attack. This has been patched in WordPress: A security weakness

a successful XXE attack. This has been patched in WordPress is affected by a security weakness. Exposure depends on how the affected operation is made reachable by the site. The resulting impact depends on how the affected component exposes the vulnerable operation.

CVE / CNA score 7.1 CVSS 3.1 · security-advisories@github.com
NVD score 6.5 CVSS 3.1 · nvd@nist.gov
Component
a successful XXE attack. This has been patched in WordPress
Plugin slug
Not applicable
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Apr 15, 2021
Weakness
CWE-611 — Improper Restriction of XML External Entity Reference
What to do

Update, patch or deactivate.

Update a successful XXE attack. This has been patched in WordPress to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

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

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

References

Primary and upstream sources