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Vulnerability record · CVE-2023-36127 · published 10 October 2023

CVE-2023-36127: Phpjabbers appointment scheduler observable discrepancy vulnerability

Phpjabbers · Appointment Scheduler

User enumeration is found in in PHPJabbers Appointment Scheduler 3.0. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.

7.5 CVSS 3.1 High EPSS 0.59% · top 53.8% CWE-203 · Observable discrepancy
7.5CVSS 3.1 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

User enumeration is found in in PHPJabbers Appointment Scheduler 3.0. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://medium.com/%40bcksec/multiple-vulnerabilities-in-php-jabbers-scripts-25af4afcadd4
https://medium.com/%40bcksec/multiple-vulnerabilities-in-php-jabbers-scripts-25af4afcadd4

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-48841Phpjabbers appointment scheduler injection vulnerabilityAppointment Scheduler 3.0 is vulnerable to CSV Injection via a Language > Labels > Export action.EPSS 1.2%7.5CVE-2023-48840Phpjabbers appointment scheduler uncontrolled resource consumption vulnerabilityA lack of rate limiting in pjActionAjaxSend in Appointment Scheduler 3.0 allows attackers to cause resource exhaustion.EPSS 1.1%6.8CVE-2014-10001Phpjabbers appointment scheduler cross-site request forgery vulnerabilityMultiple cross-site request forgery (CSRF) vulnerabilities in PHPJabbers Appointment Scheduler 2.0 allow remote attackers to hijack the authenticatio…EPSS 2.3%6.1CVE-2023-36126Phpjabbers appointment scheduler cross-site scripting vulnerabilityThere is a Cross Site Scripting (XSS) vulnerability in the "theme" parameter of preview.php in PHPJabbers Appointment Scheduler v3.0EPSS 0.38%5.4CVE-2023-48838Phpjabbers appointment scheduler cross-site scripting vulnerabilityAppointment Scheduler 3.0 is vulnerable to Multiple HTML Injection issues via the SMS API Key or Default Country Code.EPSS 0.46%5.4CVE-2023-48839Phpjabbers appointment scheduler cross-site scripting vulnerabilityAppointment Scheduler 3.0 is vulnerable to Multiple Stored Cross-Site Scripting (XSS) issues via the name, plugin_sms_api_key, plugin_sms_country_cod…EPSS 0.42%5.0CVE-2014-10010Phpjabbers appointment scheduler path traversal vulnerabilityDirectory traversal vulnerability in PHPJabbers Appointment Scheduler 2.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the i…EPSS 7.7%5.3CVE-2024-39891Twilio Authy API phone number enumeration via observable discrepancyAn unauthenticated endpoint in the Twilio Authy API, reachable through Authy Android before 25.1.0 and Authy iOS before 26.1.0, accepted streams of p…KEVEPSS 1.7%analysed

Source: NIST National Vulnerability Database (record CVE-2023-36127), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.