CVE-2021-29447
WordPress Authenticated XXE attack when installation is running PHP 8
MEDIUM 6.5EPSS 85.7%
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 · wordpress-develop
- CVSS v3.1 NVD
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS v3.1 GITHUB
- 7.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N - CVSS v2.0 NVD
- 4.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:N/A:N - EPSS
- 85.72% chance of exploitation in the next 30 days, 100th percentile
- Published
- 2021-04-15
- Updated
- 2024-08-03
Proof-of-concept exploits (28)
- http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html
- https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/
- 0xRar/CVE-2021-29447-PoC6★ · 2023-01-31
- Abdulazizalsewedy/CVE-2021-294472★ · 2022-11-21
- ArtemCyberLab/Project-Project-Chimera-Exploiting-a-Modern-WordPress-XXE-to-Pillage-Secret…1★ · 2025-08-22
- AssassinUKG/CVE-2021-294470★ · 2021-08-27
- G01d3nW01f/CVE-2021-294470★ · 2022-12-25
- Grois333/WordPress-Hacking-Penetration-Testing5★ · 2025-03-27
- Ki11i0n4ir3/CVE-2021-294470★ · 2022-12-25
- M3l0nPan/wordpress-cve-2021-294474★ · 2022-11-11
- Tea-On/CVE-2021-29447-Authenticated-XXE-WordPress-5.6-5.72★ · 2025-07-05
- Val-Resh/CVE-2021-29447-POC1★ · 2022-11-06
- Vulnmachines/wordpress_cve-2021-294474★ · 2021-05-23
- andyhsu024/CVE-2021-294470★ · 2023-04-30
- b-abderrahmane/CVE-2021-29447-POC1★ · 2023-12-15
- dnr6419/CVE-2021-294473★ · 2022-01-10
- elf1337/blind-xxe-controller-CVE-2021-294473★ · 2022-11-11
- magicrc/CVE-2021-294470★ · 2025-06-13
- mega8bit/exploit_cve-2021-294477★ · 2022-11-27
- motikan2010/CVE-2021-2944744★ · 2021-10-04
- specializzazione-cyber-security/demo-CVE-2021-29447-lezione0★ · 2024-12-03
- thomas-osgood/CVE-2021-294473★ · 2023-03-28
- viardant/CVE-2021-294470★ · 2023-01-17
- 0xricksanchez/CVE-2021-294470★ · 2025-10-31
- danilo1992-sys/CVE-2021-294470★ · 2026-03-20
- davids52/cve-2021-29447_auto-script0★ · 2025-12-18
- rdana55/CVE-2021-29447-PoC0★ · 2026-05-07
- Kashyapghodasara/Public_Exploit-1--Wordpress-CVE-2021-294470★ · 2026-09-16
ExploitDB entries (1)
Exploit collections (1)
- WordPress 5.6-5.7-经过身份验证的XXE（CVE-2021-29447）.mdtzwlhack/Vulnerability
Security advisories
- https://wordpress.org/news/category/security
- http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-Wo…
- https://blog.sonarsource.com/wordpress-xxe-security-vulnerability
- WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh
- https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html
- https://www.debian.org/security/2021/dsa-4896