Vulnerability Report

CVE-2021-29447

Title: Wordpress XML External Entity (XXE)

XML External Entity (XXE)

Proof Of Concept

PoC Available for CVE-2021-29447

CWE Category CWE-611
Published Date Apr 15, 2021
Modified Date Nov 21, 2024
Exploit Status Available
Score 7.1 CVSS v3.1
Exploit Probability (EPSS)
89.97%

Vulnerability Summary

CVE-2021-29447: 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.

Impacted Vendors

W
wordpress 1

Reference Links

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 https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/ https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html https://wordpress.org/news/category/security/ https://www.debian.org/security/2021/dsa-4896 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 https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/ https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html https://wordpress.org/news/category/security/ https://www.debian.org/security/2021/dsa-4896
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
4.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:S/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-29447 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/50304
View Code
MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Affected Stack

No specific products linked.