How severe is CVE-2023-31903?

CVE-2023-31903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-31903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31903?

CVE-2023-31903 affects Freeguppy Guppy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-31903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-31903 published?

CVE-2023-31903 was published on 2023-05-17 and last updated on 2026-06-17.

CVE-2023-31903

CVE-2023-31903 is a critical-severity vulnerability in Freeguppy Guppy with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Freeguppy Guppy
Published: 2023-05-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-31903?: GuppY CMS 6.00.10 is vulnerable to Unrestricted File Upload which allows remote attackers to execute arbitrary code by uploading a php file.
How severe is CVE-2023-31903?: CVE-2023-31903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-31903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31903?: CVE-2023-31903 affects Freeguppy Guppy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-31903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-31903 published?: CVE-2023-31903 was published on 2023-05-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freeguppy:guppy:6.00.10:*:*:*:*:*:*:*

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