CVE-2021-47783

MEDIUM
2026-01-16 [email protected]
5.4
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 09, 2026 - 14:52 vuln.today
Public exploit code
CVE Published
Jan 16, 2026 - 00:16 nvd
MEDIUM 5.4

Tags

XSS Phpwcms

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.

Analysis

Phpwcms versions up to 1.9.30 is affected by unrestricted upload of file with dangerous type (CVSS 5.4).

Technical Context

This vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affects Phpwcms. 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.

Affected Products

Vendor: Phpwcms. Product: Phpwcms. Versions: up to 1.9.30.

Remediation

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

Priority Score

47
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +27
POC: +20

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CVE-2021-47783 vulnerability details – vuln.today
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