How severe is CVE-2021-24673?

CVE-2021-24673 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24673 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24673?

CVE-2021-24673 affects Dwbooster Appointment Hour Booking. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24673?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-24673 published?

CVE-2021-24673 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2021-24673

CVE-2021-24673 is a medium-severity vulnerability in Dwbooster Appointment Hour Booking with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Dwbooster Appointment Hour Booking
Published: 2021-10-04
Last modified: 2026-06-17

Description

The Appointment Hour Booking WordPress plugin before 1.3.16 does not escape some of the Calendar Form settings, allowing high privilege users to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

Frequently asked questions

What is CVE-2021-24673?: The Appointment Hour Booking WordPress plugin before 1.3.16 does not escape some of the Calendar Form settings, allowing high privilege users to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.
How severe is CVE-2021-24673?: CVE-2021-24673 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24673 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24673?: CVE-2021-24673 affects Dwbooster Appointment Hour Booking. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24673?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24673 published?: CVE-2021-24673 was published on 2021-10-04 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/75a67932-d831-4dfb-a70d-a07650eaa755

Affected products (1)

cpe:2.3:a:dwbooster:appointment_hour_booking:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Dwbooster Appointment Hour Booking

CVE-2022-4035 — High (CVSS 7.2): The Appointment Hour Booking plugin for WordPress is vulnerable to iFrame Injection via the ‘email’ or general…
CVE-2019-13505 — Medium (CVSS 6.1): The Appointment Hour Booking plugin 1.1.44 for WordPress allows XSS via the E-mail field, as demonstrated by email_1.
CVE-2022-4034 — Medium (CVSS 5.8): The Appointment Hour Booking Plugin for WordPress is vulnerable to CSV Injection in versions up to, and including,…
CVE-2021-24712 — Medium (CVSS 5.4): The Appointment Hour Booking WordPress plugin before 1.3.17 does not properly sanitize values used when creating new…
CVE-2022-4036 — Medium (CVSS 5.3): The Appointment Hour Booking plugin for WordPress is vulnerable to CAPTCHA bypass in versions up to, and including,…
CVE-2022-1710 — Medium (CVSS 4.8): The Appointment Hour Booking WordPress plugin before 1.3.56 does not sanitise and escape a settings of its Calendar…

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