How severe is CVE-2023-50851?

CVE-2023-50851 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.

Is CVE-2023-50851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-50851?

CVE-2023-50851 affects Nsqua Simply Schedule Appointments. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-50851?

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

When was CVE-2023-50851 published?

CVE-2023-50851 was published on 2023-12-28 and last updated on 2026-06-17.

CVE-2023-50851

CVE-2023-50851 is a high-severity vulnerability in Nsqua Simply Schedule Appointments with a CVSS 3.x base score of 7.6. 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-89.

Key facts

Severity: High (CVSS 3.x base score 7.6)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Nsqua Simply Schedule Appointments
Published: 2023-12-28
Last modified: 2026-06-17

Description

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in N Squared Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin.This issue affects Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin: from n/a before 1.6.6.1.

Frequently asked questions

What is CVE-2023-50851?: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in N Squared Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin.This issue affects Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin: from n/a before 1.6.6.1.
How severe is CVE-2023-50851?: CVE-2023-50851 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.
Is CVE-2023-50851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-50851?: CVE-2023-50851 affects Nsqua Simply Schedule Appointments. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-50851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-50851 published?: CVE-2023-50851 was published on 2023-12-28 and last updated on 2026-06-17.

References

https://patchstack.com/database/vulnerability/simply-schedule-appointments/wordpress-simply-schedule-appointments-booking-plugin-1-6-6-1-sql-injection-vulnerability?_s_id=cve

Affected products (1)

cpe:2.3:a:nsqua:simply_schedule_appointments:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Nsqua Simply Schedule Appointments

CVE-2024-7129 — High (CVSS 7.2): The Appointment Booking Calendar WordPress plugin before 1.6.7.43 does not escape template syntax provided via user…
CVE-2022-2373 — Medium (CVSS 5.3): The Simply Schedule Appointments WordPress plugin before 1.5.7.7 is missing authorisation in a REST endpoint, allowing…
CVE-2024-7877 — Medium (CVSS 4.8): The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.55 does…
CVE-2024-7876 — Medium (CVSS 4.8): The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin WordPress plugin before 1.6.7.55 does…
CVE-2022-2374 — Medium (CVSS 4.8): The Simply Schedule Appointments WordPress plugin before 1.5.7.7 does not sanitise and escape some of its settings,…

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