osTicket

Overview

• Open-source support ticketing system

• Written in PHP with MySQL backend

• Often exposes company email domains

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Discovery

• Cookie: OSTSESSID

• Footer: "powered by osTicket"

• Default path: /support/

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Email Domain Exposure

Attack Flow

1. Create support ticket on osTicket portal

2. osTicket assigns temporary email: [e-mail]

3. Use this email to register on other services (Slack, GitLab, etc.)

4. Verification emails appear in osTicket ticket thread

Exploitation

1. Submit new ticket

2. Note assigned email (e.g., [e-mail])

3. Use email to register on:

   • Slack workspace

   • GitLab instance

   • Mattermost

   • Internal wikis

4. Check ticket for verification email

5. Complete registration on target service

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CVE-2020-24881 (SSRF)

Affects: osTicket 1.14.1

SSRF vulnerability to access internal resources:

# May allow internal port scanning
# May expose internal services

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Credential Reuse

If you obtain leaked credentials (via Dehashed, breaches):

1. Try credentials on osTicket admin panel

2. Admin panel typically at /scp/

3. Look for API keys, integrations, email configs

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Important Paths

Path	Description
/scp/	Staff Control Panel (admin)
/api/	API endpoint
/kb/	Knowledge base
/tickets.php	Ticket submission

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Post-Access

If admin access obtained:

• Check Admin Panel → Emails for SMTP credentials

• Check Admin Panel → API Keys for API tokens

• Review Admin Panel → Plugins for integrations