Arbitrary file upload in WordPress Popular Posts plugin
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-42362 |
| CWE-ID | CWE-434 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
WordPress Popular Posts Web applications / Modules and components for CMS |
| Vendor | Hector Cabrera |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Arbitrary file upload
EUVDB-ID: #VU58267
Risk: Medium
CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID: CVE-2021-42362
CWE-ID:
CWE-434 - Unrestricted Upload of File with Dangerous Type
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient validation of file during file upload in the ~/src/Image.php file. A remote authenticated attacker can upload a malicious file and execute it on the server.
MitigationInstall update from vendor's website.
Vulnerable software versionsWordPress Popular Posts: 1.0 - 5.3.2
External linkshttp://www.wordfence.com/vulnerability-advisories/#CVE-2021-42362
http://wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009
http://plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/Image.php
http://blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-plugin/
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, a fully functional exploit for this vulnerability is available.
