Flipster Web & Mobile: Program info

Rewards Range

Critical (CVSS 9.0–10.0): $800 – $3,000
CVSS 9.0-9.3: $800-$1,500
CVSS 9.4-9.7: $1,500-$2,200
CVSS 9.8-10.0: $2,200-$3,000

High (CVSS 7.0–8.9): $600 – $800
CVSS 7.0–7.5: $600 – $650
CVSS 7.6–8.2: $650 – $725
CVSS 8.3–8.9: $725 – $800

Medium (CVSS 4.0–6.9): $300 – $600
CVSS 4.0–4.9: $300 – $400
CVSS 5.0–5.9: $400 – $500
CVSS 6.0–6.9: $500 – $600

Low (CVSS 0.1–3.9): $50 – $300
CVSS 0.1–1.9: $50 – $150
CVSS 2.0–2.9: $150 – $225
CVSS 3.0–3.9: $225 – $300

IN SCOPE VULNERABILITIES: WEB, MOBILE

We are interested in the following vulnerabilities:

• Business logic issues
• Payments manipulation
• Remote code execution (RCE)
• Injection vulnerabilities (SQL, XXE)
• File inclusions (Local & Remote)
• Access Control Issues (IDOR, Privilege Escalation, etc)
• Leakage of sensitive information
• Server-Side Request Forgery (SSRF)
• Cross-Site Request Forgery (CSRF)
• Cross-Site Scripting (XSS)
• Directory traversal
• Other vulnerabilities with a clear potential loss

OUT OF SCOPE: WEB VULNERABILITIES

Vulnerabilities found in out of scope resources are unlikely to be rewarded unless they present a serious business risk (at our sole discretion). In general, the following vulnerabilities do not correspond to the severity threshold:

• Vulnerabilities in third-party applications
• Assets that do not belong to the company
• Best practices concerns
• Recently (less than 30 days) disclosed 0day vulnerabilities
• Vulnerabilities affecting users of outdated browsers or platforms
• Social engineering, phishing, physical, or other fraud activities
• Publicly accessible login panels without proof of exploitation
• Reports that state that software is out of date / vulnerable without a proof of concept
• Reports generated by scanners or any automated or active exploit tools
• Vulnerabilities involving active content such as web browser add-ons
• Most brute-forcing issues without clear impact
• Denial of service (DoS/DDoS)
• Theoretical issues
• Moderately Sensitive Information Disclosure
• Spam (sms, email, etc)
• Missing HTTP security headers
• Infrastructure vulnerabilities, including:
  • Certificates/TLS/SSL-related issues;
  • DNS issues (i.e. MX records, SPF records, DMARC records etc.);
  • Server configuration issues (i.e., open ports, TLS, etc.)
• Open redirects
• Session fixation
• User account enumeration
• Clickjacking / Tapjacking and issues only exploitable through clickjacking/tapjacking
• Descriptive error messages (e.g. Stack Traces, application or server errors)
• Self-XSS that cannot be used to exploit other users
• Login & Logout CSRF
• Weak Captcha / Captcha Bypass
• Lack of Secure and HTTPOnly cookie flags
• Username / email enumeration via Login/Forgot Password Page error messages
• CSRF in forms that are available to anonymous users (e.g. the contact form)
• OPTIONS / TRACE HTTP method enabled
• Host header issues without proof-of-concept demonstrating clear security impact
• Content spoofing and text injection issues without showing an attack vector / without being able to modify HTML/CSS
• Content Spoofing without embedded links / HTML
• Reflected File Download (RFD)
• Mixed HTTP Content
• HTTPS Mixed Content Scripts
• Manipulation with Password Reset Token
• MitM and local attacks
• Response manipulations without demonstration of system state change

OUT OF SCOPE: MOBILE VULNERABILITIES

• Attacks requiring physical access to a user's device
• Vulnerabilities that require root/jailbreak
• Vulnerabilities requiring extensive user interaction
• Exposure of non-sensitive data on the device
• Reports from static analysis of the binary without PoC that impacts business logic
• Lack of obfuscation/binary protection/root (jailbreak) detection
• Bypass certificate pinning on rooted devices
• Lack of Exploit mitigations i.e., PIE, ARC, or Stack Canaries
• Sensitive data in URLs/request bodies when protected by TLS
• Path disclosure in binary
• OAuth & app secret hard-coded/recoverable in IPA, APK
• Sensitive information retained as plaintext in the device’s memory
• Crashes due to malformed URL Schemes or Intents sent to exported Activity/Service/Broadcast Receiver
• Any kind of sensitive data stored in-app private directory
• Runtime hacking exploits using tools like but not limited to Frida/Appmon (exploits only possible in a jailbroken environment)
• Shared links leaked through the system clipboard
• Any URIs leaked because a malicious app has permission to view URIs opened.
• Exposure of API keys with no security impact (Google Maps API keys etc.)
• Reports that bypass rate limiting through changing of IP addresses/Device IDs
• Address bar/URL/domain spoofing in dApp browser
• Reports with mobile versions not downloaded from official sites listed in our scope

• Avoid using web application scanners for automatic vulnerability searching which generates massive traffic
• Make every effort not to damage or restrict the availability of products, services, or infrastructure
• Avoid compromising any personal data, interruption, or degradation of any service
• Don’t access or modify other user data, localize all tests to your accounts
• Perform testing only within the scope
• Don’t exploit any DoS/DDoS vulnerabilities, social engineering attacks, or spam
• Don’t spam forms or account creation flows using automated scanners
• In case you find chain vulnerabilities we’ll pay only for vulnerability with the highest severity.
• Don’t break any law and stay in the defined scope
• Any details of found vulnerabilities must not be communicated to anyone who is not a HackenProof Team or an authorized employee of this Company without appropriate permission

• Do not discuss this program or any vulnerabilities (even resolved ones) outside of the program without express consent from the organization
• No vulnerability disclosure, including partial is allowed for the moment.
• Please do NOT publish/discuss bugs

We are happy to thank everyone who submits valid reports which help us improve the security. However, only those that meet the following eligibility requirements may receive a monetary reward:

• You must be the first reporter of a vulnerability.
• The vulnerability must be a qualifying vulnerability
• Any vulnerability found must be reported no later than 24 hours after discovery and exclusively through hackenproof.com
• You must send a clear textual description of the report along with steps to reproduce the issue. Include attachments such as screenshots, proof of concept code, or videos as necessary.
• You must not be a former or current employee of us or one of its contractor.
• ONLY USE the EMAIL under which you registered your HackenProof account (in case of violation, no bounty can be awarded)
• Provide detailed but to-the point reproduction steps