DeFi Saver

Submit a Bug
21 April 2021
Live since
KYC required
Maximum bounty

Program Overview

DeFi Saver is an advanced management app for decentralized finance protocols such as MakerDAO, Compound, Aave and Reflexer, with a special focus on creating and managing leveraged positions.

Some of the specific things you can use DeFi Saver for include:

  • Creating and managing collateralized debt positions in any of the most popular DeFi lending protocols, with 1-tx instant leveraging and deleveraging options
  • Automating your position for automatic liquidation protection, as well as automatic leverage management, based on market movements
  • Refinancing your position with options to change collateral or debt assets, or to move to a different protocol altogether with the Loan Shifter
  • Creating your own custom set of actions to execute within one transaction in their recently introduced Recipe Creator.

For more information about DeFi Saver, visit their website at

The bug bounty program is focused around its smart contracts, website and app and is mostly concerned with the loss of user funds and approval/auth attacks.

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.

All web/app bug reports must come with a PoC with an end-effect impacting an asset-in-scope in order to be considered for a reward. All High and Critical Smart Contract bug reports require a PoC to be eligible for a reward. Explanations and statements are not accepted as PoC and code is required.

Critical smart contract vulnerabilities are capped at 10% of economic damage, primarily taking into consideration funds at risk, but also PR and branding aspects, at the discretion of the team. However, there is a minimum reward of USD 50 000.

All vulnerabilities marked in the security reviews are not eligible for a reward.

Payouts are handled by the Defi Saver team directly and are denominated in USD. However, payouts are done in DAI and USDC, with the choice of the ratio at the discretion of the team.

Smart Contract

Up to USD $250,000
PoC Required
USD $30,000
PoC Required
USD $10,000
USD $1,000

Websites and Applications

USD $20,000
PoC Required

Assets in scope

All smart contracts of Defi Saver can be found at However, only those in the Assets in Scope table are considered as in-scope of the bug bounty program.

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

  • Temporary freezing of funds for any amount of time

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 requiring access to leaked keys/credentials
  • Attacks requiring access to privileged addresses (governance, strategist)

Smart Contracts and 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
  • Centralization risks

Websites and Apps

  • Theoretical vulnerabilities without any proof or demonstration
  • Content spoofing / Text injection issues
  • Self-XSS
  • Captcha bypass using OCR
  • CSRF with no security impact (logout CSRF, change language, etc.)
  • Missing HTTP Security Headers (such as X-FRAME-OPTIONS) or cookie security flags (such as “httponly”)
  • Server-side information disclosure such as IPs, server names, and most stack traces
  • Vulnerabilities used to enumerate or confirm the existence of users or tenants
  • Vulnerabilities requiring unlikely user actions
  • URL Redirects (unless combined with another vulnerability to produce a more severe vulnerability)
  • Lack of SSL/TLS best practices
  • DDoS vulnerabilities
    • Attacks requiring privileged access from within the organization
    • Feature requests
    • Best practices

The following activities are prohibited by this 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
  • Public disclosure of an unpatched vulnerability in an embargoed bounty