Skip to content
bugbounty.fyi
Get paid to secure open source 475 paid open-source programs on Sorona, up to $1M Perk Low bugs: $100 or 1 mo Claude Max

Also on Patchstack. All 476 paid open-source programs

Try

Highest paying Newly launched Paid without KYC Full safe harbor
All results

About this site

Five9

Vulnerability disclosure program on security.txt five9.com

Accepting reports Full safe harbor security.txt
Go to program Website
Top reward
No cash rewards
Top severity paid
Not published
Assets in scope
8
Public CVEs
0
Last change

At a glance

What to know before you start testing.

No cash rewards
A disclosure program: you report for credit, not money.
Report by email
[email protected]
Full safe harbor
Good-faith research is authorised; no legal action.
Replies within 3 days
As the policy promises.
Publish after a fix
Coordinate the timing with the company.

Rewards

What the company's own policy page says it pays.

This program does not pay cash rewards.

Pays cash
No Five9 does not currently offer monetary rewards under this Vulnerability Disclosure Policy.
Response
Within 3 days Acknowledge reports within 3 business days
Safe harbor
Full We will not pursue legal action against researchers acting in good faith within the scope of this policy
Hall of fame
No Credit researchers when mutually agreed

Summarised with AI from the company's policy, read 12 Nov 2026, and checked word for word against it. Read the original

Scope

8 assets you may test, 10 excluded.

Domains 2

  • five9.com
  • five9.eu

APIs 1

  • Public APIs and developer interfaces

Wildcard domains 1

  • five9-owned domains and subdomains

Products and areas 4

  • Customer portals and administrative interfaces
  • Five9 cloud services and infrastructure
  • Mobile applications (iOS and Android)
  • Other Five9-operated Internet-facing assets
Out of scope (10)
  • Best-practice recommendations without exploitability
  • Clickjacking without security impact
  • Encrypted traffic interception / decryption
  • Missing SPF/DMARC records only
  • Physical attacks and access to facilities
  • Rate limiting or throttling issues
  • Self-XSS and other low-impact issues
  • Social engineering (e.g. phishing, vishing)
  • Third-party services and integrations
  • Version disclosure

Rules

What the policy asks of you, and the bug types it won't reward, quoted from Five9's policy. "We" in these lines means the program, not this site.

While testing

  • Please do not perform actions that could degrade service availability or impact other users
  • Do not access, modify, or retain customer data beyond what is necessary to demonstrate the issue
  • Immediately stop testing and notify us if you encounter customer information
  • Avoid actions that may impact customers or degrade service availability
  • Avoid automated high-volume scanning or denial of service testing
  • Do not modify or destroy data
  • Immediately stop if customer information is encountered
  • Follow all applicable laws and regulations

Not accepted

  • Social engineering (e.g. phishing, vishing)
  • Physical attacks and access to facilities
  • Encrypted traffic interception / decryption
  • Rate limiting or throttling issues
  • Missing SPF/DMARC records only
  • Self-XSS and other low-impact issues
  • Clickjacking without security impact
  • Version disclosure
  • Best-practice recommendations without exploitability

Summarised with AI from the company's policy, read 12 Nov 2026, and checked word for word against it. Read the original

Changes

Tracked since 11 Nov 2026. Last checked 2 hours ago.

  1. Scope +

    Added to scope: five9.eu

Public CVEs

Published vulnerabilities in this vendor's products, from the NVD.

Search NVD

No CVEs matched yet. We match NVD records by vendor name, so products sold under another name can be missing.