# CVE-2021-29447

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-29447
- CVSS: 7.1
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 85.72% (percentile 99.7)
- Public exploit code: 1 on Exploit-DB · 24 GitHub proofs of concept (first 2021-04-16)
- Weakness: CWE-611
- Published: 2021-04-15

## Affected versions

- WordPress wordpress-develop: affected >= 5.6.0 and < 5.7.1

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh
- [other] https://wordpress.org/news/category/security/
- [other] https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html
- [advisory] https://www.debian.org/security/2021/dsa-4896
- [other] http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.html
- [other] http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html
- [other] https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.