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Horizen

Horizen technology offerings enable web3 developers to custom-build blockchains and dapps with a level of flexibility unmatched by others and help organizations leverage the blockchain to solve a broad range of complex use cases.

Blockchain
L2
C/C++
Java
Maximum Bounty
$50,000
Live Since
20 April 2023
Last Updated
18 July 2025
  • PoC Required

  • KYC required

Select the category you'd like to explore

Assets in Scope

Target
Type
Smart Contract - Migration Smart Contracts and Dump Scripts
Added on
18 July 2025
Target
Type
Websites and Applications - Migration Check Script
Added on
18 July 2025
Target
Type
Websites and Applications - Support for all signing tools
Added on
18 July 2025
Target
Type
Websites and Applications - Offline Ledger signing Tool
Added on
18 July 2025
Target
Type
Websites and Applications - CLI Claim Tool
Added on
18 July 2025
Target
Type
Websites and Applications - Migration Portal
Added on
18 July 2025
Target
Type
Blockchain/DLT - EON Sidechain and EVM
Added on
18 July 2025
Target
Type
Blockchain/DLT - Sparkz
Added on
18 July 2025
Target
Type
Blockchain/DLT - SDK
Added on
18 July 2025
Target
Type
Blockchain/DLT - Zen Mainchain (Gobi Testnest)
Added on
18 July 2025

Impacts in Scope

Severity
Critical
Title

Direct loss of funds

Severity
Critical
Title

Permanent freezing of funds (fix requires hardfork)

Severity
Critical
Title

Network not being able to confirm new transactions (total network shutdown)

Severity
Critical
Title

Unintended permanent chain split requiring hard fork (network partition requiring hard fork)

Severity
Critical
Title

Manipulation of governance voting result deviating from voted outcome and resulting in a direct change from intended effect of original results

Severity
Critical
Title

Direct theft of any user funds, whether at-rest or in-motion, other than unclaimed yield

Severity
Critical
Title

Permanent freezing of funds

Severity
Critical
Title

Protocol insolvency

Severity
Critical
Title

Execute arbitrary system commands

Severity
Critical
Title

Retrieve sensitive data/files from a running server, such as:

  • /etc/shadow
  • database passwords
  • blockchain keys (this does not include non-sensitive environment variables, open source code, or usernames)
Severity
Critical
Title

Taking down the application/website

Severity
Critical
Title

Subdomain takeover with already-connected wallet interaction

Out of scope

Program's Out of Scope information
Default Out of Scope and rules

Blockchain/DLT specific

  • Incorrect data supplied by third party oracles
    • Not to exclude oracle manipulation/flash loan attacks
  • Impacts requiring basic economic and governance attacks (e.g. 51% attack)
  • Lack of liquidity impacts
  • Impacts from Sybil attacks
  • Impacts involving centralization risks

All categories

  • Impacts requiring attacks that the reporter has already exploited themselves, leading to damage
  • Impacts caused by attacks requiring access to leaked keys/credentials
  • Impacts caused by attacks requiring access to privileged addresses (including, but not limited to: governance and strategist contracts) without additional modifications to the privileges attributed
  • Impacts relying on attacks involving the depegging of an external stablecoin where the attacker does not directly cause the depegging due to a bug in code
  • Mentions of secrets, access tokens, API keys, private keys, etc. in Github will be considered out of scope without proof that they are in-use in production
  • Best practice recommendations
  • Feature requests
  • Impacts on test files and configuration files unless stated otherwise in the bug bounty program
  • Impacts requiring phishing or other social engineering attacks against project's employees and/or customers