Multiple vulnerabilities in WordPress
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-29447 CVE-2021-29450 |
| CWE-ID | CWE-611 CWE-264 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
WordPress Web applications / CMS |
| Vendor | WordPress.ORG |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) XML External Entity injection
EUVDB-ID: #VU52549
Risk: Medium
CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-29447
CWE-ID:
CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
Exploit availability: Yes
DescriptionThe vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input in the Media Library. A remote authenticated user with ability to upload files can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWordPress: 4.7 - 5.7
External linkshttp://wordpress.org/news/category/security/
http://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh
http://github.com/0xRar/CVE-2021-29447-PoC
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
2) Security restrictions bypass
EUVDB-ID: #VU52550
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-29450
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to application does not properly impose security restrictions within REST API implementation. A remote user with contributor privileges can access password-protected posts and pages.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWordPress: 4.7 - 5.7
External linkshttp://github.com/WordPress/wordpress-develop/security/advisories/GHSA-pmmh-2f36-wvhq
http://wordpress.org/news/category/security/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
