Is CVE-2023-31903 actively exploited?

No active exploitation of CVE-2023-31903 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-31903 be exploited remotely?

Yes. CVE-2023-31903 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-31903?

CVE-2023-31903 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-31903

CWE-434Published: May 17, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

GuppY CMS 6.00.10 is vulnerable to Unrestricted File Upload which allows remote attackers to execute arbitrary code by uploading a php file.

NVD Source

Risk Analysis

GuppY CMS 6.00.10 is susceptible to unrestricted file uploads, enabling remote attackers to upload and execute PHP files. This critical vulnerability has a 9.8 CVSS score, posing a high risk of remote code execution.

No public exploit is known, and it is not in the CISA KEV. It is remotely exploitable.

Recommended Action

Upgrade to a patched version of GuppY CMS and implement strict file extension filtering on the server.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-31903 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.