WordPress core
CVE-2021-29447
WordPress: Authenticated XXE attack when installation is running PHP 8
- Severity
- Medium 6.5
- Published
- 15 Apr 2021
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 17 Oct 2026
- Fixed in
- 5.7.1
- Also known as
- GHSA-rv47-pc52-qrhh
- Sources
- NVD, WordPress
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.…
Affected software
| Software | Affected versions |
|---|---|
WordPressWordPress core · cpe:a:wordpress:wordpress |
|
References
- NVD https://nvd.nist.gov/vuln/detail/CVE-2021-29447
- CVE.org https://www.cve.org/CVERecord?id=CVE-2021-29447
- GitHub Advisory Database https://github.com/advisories/GHSA-rv47-pc52-qrhh
- WordPress security advisory https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh