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

CVE-2021-47783 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Phpwcms are affected by CVE-2021-47783?

Organizations using Phpwcms 1.9.30 should be aware of moderate risk from CVE-2021-47783, a unrestricted file upload vulnerability rated CVSS 5.4. This could allow unauthorized file access.

Is there a public PoC exploit available for CVE-2021-47783?

Yes, a public proof-of-concept exploit is available for CVE-2021-47783. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47783?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls.

Phpwcms CVE-2021-47783

MEDIUM

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-01-16 disclosure@vulncheck.com

XSS Phpwcms

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

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

DescriptionCVE.org

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.

AnalysisAI

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

Technical ContextAI

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.

RemediationAI

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

CVE-2021-47783 vulnerability details – vuln.today

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