Nexus Mutual

Submit a Bug
23 February 2021
Live since
No
KYC required
$50,000
Maximum bounty
13 October 2022
Last updated

Program Overview

Nexus Mutual is a discretionary mutual offering a decentralized alternative to insurance.

Nexus Mutual is interested in securing its smart contracts and preventing economic attacks on the bonding curve, funds being stolen from the capital pool or users, funds being locked or rendered inaccessible to their owners, in addition to blocking users from performing other users’ actions on their behalf that would risk or put their funds in danger.

Rewards by Threat Level

Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System. This is a simplified 5-level scale, with separate scales for websites/apps and smart contracts/blockchains, encompassing everything from consequence of exploitation to privilege required to likelihood of a successful exploit.

Payouts are handled by Nexus Mutual directly and are denominated in USD. However, payouts are done in USDC.

Smart Contract

Critical
Level
up to USD $50,000
Payout
High
Level
up to USD $25,000
Payout
Medium
Level
up to USD $10,000
Payout
Low
Level
up to USD $2,000
Payout
Informational
Level
USD $0
Payout

Assets in scope

Impacts in scope

Only the following impacts are accepted within this bug bounty program. All other impacts are not considered as in-scope, even if they affect something in the assets in scope table.

Smart Contract

  • Critical Smart Contract Impact
    Critical
    Impact
  • High Smart Contract Impact
    High
    Impact
  • Medium Smart Contract Impact
    Medium
    Impact
  • Low Smart Contract Impact
    Low
    Impact

Out of Scope & Rules

The following vulnerabilities are excluded from the rewards for this bug bounty program:

  • Attacks that the reporter has already exploited themselves, leading to damage
  • Attacks that rely on social engineering
  • Attacks requiring access to leaked keys/credentials

Smart Contracts/Blockchain

  • Incorrect data supplied by third party oracles
    • Not to exclude oracle manipulation/flash loan attacks
  • Basic economic governance attacks (e.g. 51% attack)
  • Lack of liquidity
  • Best practice critiques
  • Sybil attacks

The following activities are prohibited by bug bounty program:

  • Any testing with mainnet or public testnet contracts; all testing should be done on private testnets
  • Any testing with pricing oracles or third party smart contracts
  • Attempting phishing or other social engineering attacks against our employees and/or customers
  • Any testing with third party systems and applications (e.g. browser extensions) as well as websites (e.g. SSO providers, advertising networks)
  • Any denial of service attacks
  • Automated testing of services that generates significant amounts of traffic
  • Disassembly or reverse engineering of binaries for which source code is not published, not including smart contract bytecode
  • Public disclosure of an unpatched vulnerability in an embargoed bounty