Arbitrary file upload in Phpwcms
CVE-2021-47783
Phpwcms 1.9.30 contains a file upload vulnerability that allows authenticated attackers to upload malicious SVG files with embedded JavaScript. Attackers can upload crafted SVG payloads through the multiple file upload feature to potentially execute cross-site scripting attacks on the platform.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Phpwcms — versions 1.9.30
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50363 (Exploit, VDB Entry, exploit)
- www.phpwcms.org/ (Product, product)
- www.vulncheck.com/advisories/phpwcms-arbitrary-file-upload (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47783?
- CVE-2021-47783 is a medium-severity vulnerability in Phpwcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.4/10. Published 2026-01-16.
- How severe is CVE-2021-47783?
- Medium severity. CVSS v3 base score is 5.4 out of 10.