Is CVE-2021-47783 actively exploited?

No active exploitation of CVE-2021-47783 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-47783 be exploited remotely?

Yes. CVE-2021-47783 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-47783?

CVE-2021-47783 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2021-47783

CWE-434Published: January 16, 2026· Updated: Jun 17, 2026

5.4

CVSS v3.1

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.

NVD Source

Technical Analysis

CVE-2021-47783 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.