What’s Vulnerable › Vulnerabilities

CVE-2022-4036: Appointment Hour Booking <= 1.3.72 - CAPTCHA Bypass

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-29 · updated 2026-06-17
• Weakness: CWE-804

Description

The Appointment Hour Booking plugin for WordPress is vulnerable to CAPTCHA bypass in versions up to, and including, 1.3.72. This is due to the use of insufficiently strong hashing algorithm on the CAPTCHA secret that is also displayed to the user via a cookie.

Affected products

• codepeople Appointment Hour Booking – Booking Calendar: through 1.3.72

References

• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2803896%40appointment-hour-booking&new=2803896%40appointment-hour-booking&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/f62d28bd-fa33-4f0b-a116-5aacc05bfa3a?source=cve
• https://www.wordfence.com/vulnerability-advisories-continued/#CVE-2022-4036
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2803896%40appointment-hour-booking&new=2803896%40appointment-hour-booking&sfp_email=&sfph_mail=
• https://www.wordfence.com/vulnerability-advisories-continued/#CVE-2022-4036

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