CVE-2021-29447 - Improper Restriction of XML External Entity Reference

Severity

65%

Complexity

27%

Confidentiality

60%

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.

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

CVSS 2.0 Base Score 4. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:S/C:P/I:N/A:N).

Overview

First reported 3 years ago

2021-04-15 21:15:00

Last updated 3 years ago

2021-12-16 20:35:00

Affected Software

WordPress

Debian Linux 9.0

9.0

References

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh

https://wordpress.org/news/category/security/

https://wordpress.org/news/category/security/

Release Notes, Vendor Advisory

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh

Third Party Advisory

[debian-lts-announce] 20210421 [SECURITY] [DLA 2630-1] wordpress security update

Mailing List, Third Party Advisory

DSA-4896

DSA-4896

Third Party Advisory

http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.html

http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html

http://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.html

Third Party Advisory, VDB Entry

http://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.html

Exploit, Third Party Advisory, VDB Entry

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