High severity7.1NVD Advisory· Published Apr 15, 2021· Updated Jun 17, 2026
CVE-2021-29447
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8<5.7.1+ 1 more
- (no CPE)range: <5.7.1
- cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*range: >=5.6.0,<5.7.1
- Range: >= 5.6.0, < 5.7.1
- osv-coords2 versions
>= 5.6.0, < 5.7.1+ 1 more
- (no CPE)range: >= 5.6.0, < 5.7.1
- (no CPE)range: >= 5.6.0, < 5.7.1
Patches
Vulnerability mechanics
References
7- packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.htmlnvdExploitThird Party AdvisoryVDB Entry
- blog.sonarsource.com/wordpress-xxe-security-vulnerability/nvdExploitThird Party Advisory
- packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.htmlnvdThird Party AdvisoryVDB Entry
- github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhhnvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/04/msg00017.htmlnvdMailing ListThird Party Advisory
- wordpress.org/news/category/security/nvdRelease NotesVendor Advisory
- www.debian.org/security/2021/dsa-4896nvdThird Party Advisory
News mentions
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