What’s Vulnerable › Vulnerabilities

CVE-2018-14085

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-07-16 · updated 2026-06-17
• Weakness: CWE-20

Description

An issue was discovered in a smart contract implementation for UserWallet 0x0a7bca9FB7AfF26c6ED8029BB6f0F5D291587c42, an Ethereum token. First, suppose that the owner adds the evil contract address to his sweepers. The evil contract looks like this: contract Exploit { uint public start; function sweep(address _token, uint _amount) returns (bool) { start = 0x123456789; return true;} }. Then, when one calls the function sweep() in the UserWallet contract, it will change the sweeperList to 0X123456789.

Affected products

• Userwallet Project Userwallet: all versions

References

• https://github.com/hellowuzekai/blockchains/blob/master/delegatecall.md
• https://github.com/hellowuzekai/blockchains/blob/master/delegatecall.md

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