How severe is CVE-2023-1728?

CVE-2023-1728 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-2023-1728 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1728?

CVE-2023-1728 affects Fernus Learning Management Systems. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-1728?

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-2023-1728 published?

CVE-2023-1728 was published on 2023-04-04 and last updated on 2026-06-17.

CVE-2023-1728

CVE-2023-1728 is a critical-severity vulnerability in Fernus Learning Management Systems 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: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Fernus Learning Management Systems
Published: 2023-04-04
Last modified: 2026-06-17

Description

Unrestricted Upload of File with Dangerous Type vulnerability in Fernus Informatics LMS allows OS Command Injection, Server Side Include (SSI) Injection. This issue affects LMS: before 23.04.03.

Frequently asked questions

What is CVE-2023-1728?: Unrestricted Upload of File with Dangerous Type vulnerability in Fernus Informatics LMS allows OS Command Injection, Server Side Include (SSI) Injection. This issue affects LMS: before 23.04.03.
How severe is CVE-2023-1728?: CVE-2023-1728 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-2023-1728 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1728?: CVE-2023-1728 affects Fernus Learning Management Systems. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-1728?: 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-2023-1728 published?: CVE-2023-1728 was published on 2023-04-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fernus:learning_management_systems:*:*:*:*:*:*:*:*

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