CVE-2022-50893

CriticalPublic PoC

Published: 13 January 2026

Published

13 January 2026

Modified

22 January 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0144 80.9th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-50893 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Viaviweb Wallpaper Admin. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 19.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SC-14 (Public Access Protections).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly validates uploaded files at the add_gallery_image.php endpoint to ensure only legitimate image types are accepted, blocking malicious PHP files and preventing RCE.

AC-3 Access Enforcement good match

prevent

Enforces authentication and authorization requirements for the image upload functionality, preventing unauthenticated remote attackers from exploiting the endpoint.

SC-14 Public Access Protections good match

prevent

Provides tailored protections for the publicly accessible upload service to restrict unauthorized or dangerous file uploads leading to code execution.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

The vulnerability allows unauthenticated remote code execution via unrestricted file upload in a public-facing web application, directly mapping to exploitation of public-facing applications.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

VIAVIWEB Wallpaper Admin 1.0 contains an unauthenticated remote code execution vulnerability in the image upload functionality. Attackers can upload a malicious PHP file through the add_gallery_image.php endpoint to execute arbitrary code on the server.

Deeper analysisAI

CVE-2022-50893 is an unauthenticated remote code execution vulnerability in VIAVIWEB Wallpaper Admin 1.0, affecting the image upload functionality. Specifically, the add_gallery_image.php endpoint allows attackers to upload a malicious PHP file, leading to arbitrary code execution on the server. The vulnerability is rated with a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-434 (Unrestricted Upload of File with Dangerous Type).

Unauthenticated attackers can exploit this vulnerability remotely with low complexity and no privileges or user interaction required. Successful exploitation enables full compromise of the server, granting high-impact access to confidentiality, integrity, and availability through arbitrary code execution.

Advisories and references, including a proof-of-concept exploit on Exploit-DB (https://www.exploit-db.com/exploits/51033), the vendor site (https://www.viaviweb.com), and a Vulncheck advisory (https://www.vulncheck.com/advisories/viaviweb-wallpaper-admin-code-execution-via-image-upload), document the issue but do not specify patches or mitigations in the available details.