CVE-2021-47783 Phpwcms 1.9.30 - Arbitrary File Upload

Medium 5.3 Published 15 Jan 2026 Updated 7 Apr 2026

Authenticated attackers can upload malicious SVG files to execute cross-site scripting attacks on the Phpwcms platform.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-47783?

CVE-2021-47783 is a medium-severity vulnerability in Phpwcms, published on 15 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-434

Which versions are affected by CVE-2021-47783?

It affects 1 product.

Products include Phpwcms Phpwcms.

How do I fix CVE-2021-47783?

No fix has been published for CVE-2021-47783 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-47783 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47783 exists.

Sources

Also known as GHSA-j425-3jgm-m83r.