Vulnerability CVE-2021-29447


Published: 2021-04-15   Modified: 2021-04-16

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.

See advisories in our WLB2 database:
Topic
Author
Date
High
WordPress 5.7 Media Library XML External Entity Injection (XXE) (Authenticated)
David Utón
30.09.2021

Type:

CWE-611

(Information Exposure Through XML External Entity Reference)

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4/10
2.9/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Wordpress -> Wordpress 

 References:
https://wordpress.org/news/category/security/
https://github.com/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

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