Arbitrary file upload in WordPress Popular Posts
CVE-2021-42362
The WordPress Popular Posts WordPress plugin is vulnerable to arbitrary file uploads due to insufficient input file type validation found in the ~/src/Image.php file which makes it possible for attackers with contributor level access and above to upload malicious files that can be used to obtain remote code execution, in versions up to and including 5.3.2.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.798 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.798 · newest: 0.798 · change: 0.000
Affected products
- WordPress Popular Posts — versions 0.0
- WordPress Popular Posts Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- blog.nintechnet.com/improper-input-validation-fixed-in-wordpress-popular-posts-… (Exploit, Third Party Advisory)
- www.wordfence.com/vulnerability-advisories/ (Third Party Advisory)
- plugins.trac.wordpress.org/changeset/2542638/wordpress-popular-posts/trunk/src/… (Patch, Third Party Advisory)
- wpscan.com/vulnerability/bd4f157c-a3d7-4535-a587-0102ba4e3009 (Third Party Advisory)
- packetstormsecurity.com/files/165376/WordPress-Popular-Posts-5.3.2-Remote-Code-… (Exploit, VDB Entry, Third Party Advisory)
- github.com/cabrerahector/wordpress-popular-posts/commit/d9b274cf6812eb446e4103c… (patch)
Frequently asked questions
- What is CVE-2021-42362?
- CVE-2021-42362 is a high-severity vulnerability in WordPress Popular Posts, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2021-11-17.
- How severe is CVE-2021-42362?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-42362 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.