CVE-2018-12454: 1000guess 1000 Guess

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

The _addguess function of a simplelottery smart contract implementation for 1000 Guess, an Ethereum gambling game, generates a random value with publicly readable variables such as the current block information and a private variable (which can be read with a getStorageAt call). Therefore, it allows attackers to always win and get rewards.

Affected products

• 1000guess 1000 Guess: affected versions not specified

Published 2018-06-17. Last modified 2026-06-17.