How severe is CVE-2023-1721?

CVE-2023-1721 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-1721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1721?

CVE-2023-1721 affects Yoga Class Registration System Project Yoga Class Registration System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-1721?

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-2023-1721 published?

CVE-2023-1721 was published on 2023-06-24 and last updated on 2026-06-17.

CVE-2023-1721

CVE-2023-1721 is a critical-severity vulnerability in Yoga Class Registration System Project Yoga Class Registration System with a CVSS 3.x base score of 9.1. 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 9.1)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Yoga Class Registration System Project Yoga Class Registration System
Published: 2023-06-24
Last modified: 2026-06-17

Description

Yoga Class Registration System version 1.0 allows an administrator to execute commands on the server. This is possible because the application does not correctly validate the thumbnails of the classes uploaded by the administrators.

Frequently asked questions

What is CVE-2023-1721?: Yoga Class Registration System version 1.0 allows an administrator to execute commands on the server. This is possible because the application does not correctly validate the thumbnails of the classes uploaded by the administrators.
How severe is CVE-2023-1721?: CVE-2023-1721 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-1721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1721?: CVE-2023-1721 affects Yoga Class Registration System Project Yoga Class Registration System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-1721?: 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-2023-1721 published?: CVE-2023-1721 was published on 2023-06-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yoga_class_registration_system_project:yoga_class_registration_system:1.0:*:*:*:*:*:*:*

More vulnerabilities in Yoga Class Registration System Project Yoga Class Registration System

CVE-2023-1722 — Critical (CVSS 9.1): Yoga Class Registration System version 1.0 allows an administrator to execute commands on the server. This is possible…
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CVE-2023-0982 — Medium (CVSS 6.3): A vulnerability was found in SourceCodester Yoga Class Registration System 1.0. It has been declared as critical.…
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