> For the complete documentation index, see [llms.txt](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security.md).

# Smart Contracts Security

- [Code 4 Rena](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena.md)
- [High Risk Findings](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings.md)
- [Anyone Can Pass Any Proposal](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/anyone-can-pass-any-proposal.md): \_Submitted by (3) Bahurum, also found by bin2chen and cryptphi\_
- [Arithmetic Rounding](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/arithmetic-rounding.md): Submitted by (11) scaraven, also found by 0x52, auditor0517, Deivitto, hansfriese, Lambda, rbserver, simon135, smiling\_heretic, sseefried, and TrungOre
- [Can Vote Multiple Times By Transferring NFT In Same Block As Proposal](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/can-vote-multiple-times-by-transferring-nft-in-same-block-as-proposal.md): \_Submitted by (2) Trust, also found by Lambda\_
- [Never Ending Proposal](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/never-ending-proposal.md): Submitted by (6) hansfriese, also found by berndartmueller, csanuragjain, m9800, V\_B, and zzzitron
- [Reusing Signatures](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/reusing-signatures.md): Submitted by (11) sseefried, also found by 0xA5DF, Bahurum, bin2chen, byndooa, cccz, GalloDaSballo, hyh, kankodu, Lambda, and minhquanym
- [Signature Verification Can Be Bypass With Zero Address](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/signature-verification-can-be-bypass-with-zero-address.md): Submitted by (4) vlad\_bochok, also found by indijanc, Lambda, and wastewa
- [Untyped Data Signing](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/untyped-data-signing.md): Submitted by (6) Lambda, also found by 0x1f8b, 0x52, horsefacts, vlad\_bochok, and wastew
- [Wrong Calculation Of Apr](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/high-risk-findings/wrong-calculation-of-apr.md): Submitted by (2) Lambda, also found by rbserver
- [Low Risk Non Critical](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/low-risk-non-critical.md)
- [Dont Check If Some Entity Actually Exists](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/low-risk-non-critical/dont-check-if-some-entity-actually-exists.md)
- [Medium Risk Findings](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings.md)
- [Bypass Signature Validity Check](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/bypass-signature-validity-check.md): Submitted by (3) cryptphi, also found by 0x1f8b and defsec
- [Copy Of Lack Of Verification In Hashes](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/copy-of-lack-of-verification-in-hashes.md): Submitted by (4) MEP, also found by byndooa, Haipls, and minhquanym
- [Function May Run Out Of Gas Leading To Loss](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/function-may-run-out-of-gas-leading-to-loss.md): \_Submitted by (14) Lambda, also found by 0x52, Bahurum, Bnke0x0, KIntern\_NA, lukris02, rbserver, Respx, rotcivegaf, Soosh, TomJ, Trust, V\_B, and yixxas\_
- [Incorrect Initialization Of Smart Contracts With Access Control Issue](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/incorrect-initialization-of-smart-contracts-with-access-control-issue.md): Submitted by (4) Haipls, also found by byndooa, cryptphi, and TrungOre
- [Invalid Signature Lead To Access Control](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/invalid-signature-lead-to-access-control.md): Submitted by (5) berndartmueller, also found by 0xA5DF, arcoun, rotcivegaf, and wastewa
- [Lack Of Checks If One Entity Get Hacked](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/lack-of-checks-if-one-entity-get-hacked.md): Submitted by (3) 0xA5DF, also found by Lambda and sseefried
- [Lack Of Verification In Hashes](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/lack-of-verification-in-hashes.md): Submitted by (4) MEP, also found by byndooa, Haipls, and minhquanym
- [Missing Upper Limit](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/missing-upper-limit.md): Submitted by (11) MiloTruck, also found by \_\_141345\_\_, 0x52, 8olidity, cccz, Ch\_301, codexploder, cryptonue, hansfriese, Ruhum, and sseefried
- [Missing Zero Address Checks](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/missing-zero-address-checks.md): Submitted by (1) Lambda
- [Possible Dos Because Unbounded Loop Can Run Out Of Gas](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/possible-dos-because-unbounded-loop-can-run-out-of-gas.md): Submitted by (4) minhquanym, also found by berndartmueller, Chom, and scaraven
- [Too Much Trust To Certain Roles](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/too-much-trust-to-certain-roles.md): Submitted by (1) GalloDaSballo
- [Unreversable Actions](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/unreversable-actions.md): Submitted by (1) 0x52
- [Useless Nft](https://simones-organization-4.gitbook.io/hackbook-of-a-hacker/smart-contracts-security/code4rena/medium-risk-findings/useless-nft.md): Submitted by (3) berndartmueller, also found by byndooa and rbserver