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CVE-2021-29447

MEDIUM 6.5 CVSS 3.1
Published
April 15, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
security-advisories@github.com
Weakness
CWE-611
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

Affected WordPress components

  • WordPress core
    Confirmed match
    From 5.6.0 (including) to 5.7.1 (excluding)

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • WordPress wordpress-develop — Version >= 5.6.0, < 5.7.1
  • wordpress wordpress — From 5.6.0 (including) to 5.7.1 (excluding)

References

  • packetstormsecurity.com http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.html Third Party Advisory, VDB Entry
  • packetstormsecurity.com http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html Exploit, Third Party Advisory, VDB Entry
  • blog.sonarsource.com https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/ Exploit, Third Party Advisory
  • github.com https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html Mailing List, Third Party Advisory
  • wordpress.org https://wordpress.org/news/category/security/ Release Notes, Vendor Advisory
  • www.debian.org https://www.debian.org/security/2021/dsa-4896 Third Party Advisory
  • nvd.nist.gov Official NVD record