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Start learningUpgrade github.com/cosmos/cosmos-sdk/baseapp to version 0.50.5 or higher.
github.com/cosmos/cosmos-sdk/baseapp is a framework for building high value public blockchains.
Affected versions of this package are vulnerable to Improper Input Validation via the ValidateVoteExtensions helper function. An attacker can manipulate the voting power of validators included in the VoteExtension by proposing altered VoteExtension data, potentially leading to unexpected or adverse effects on the modified state. Exploiting this vulnerability is possible if the chain utilizes the ValidateVoteExtensions helper in ProcessProposal.