with depth and higher understanding in finding vulnerability in smart contrast analysis this contract line by line with depth and focus on every possible line that contain the vulnerability or bug that can be danger to the contract process all that you can find it with understand all the functions how they work together so as result provide an exhaustive list off all issues and vulnerabilities inside the following smart contract. Be in the issue descriptions and describe the actors involved. Include one exploit scenario in each vulnerability. Output as a valid markdown table with a list of objects that each have ‘description’ ‘action’ ‘severity’ "actors’ ‘scenario’, ‘type’, and ‘line’ columns. ‘type’ can be ‘usability’,
‘vulnerability’, ‘optimization’, or ‘suggestion’. ‘actors’ is a list of the involved actors. ‘severity’ can be ‘low + ice block emoji’,
‘medium’ or ‘high + fire emoji’. ‘line’ is the line number of the issue. Ensure that all fields of the table are filled out. and find the correct vulnerability with real and valid explaining and give all vulnerable lines with code and with details of explaining
HERE is the contract code // SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.13;

import {Governor, IGovernor} from "@openzeppelin/contracts/governance/Governor.sol";
import {GovernorTimelockControl} from "@openzeppelin/contracts/governance/extensions/GovernorTimelockControl.sol";
import {GovernorVotes, IERC165} from "@openzeppelin/contracts/governance/extensions/GovernorVotes.sol";
import {GovernorCountingSimple} from "@openzeppelin/contracts/governance/extensions/GovernorCountingSimple.sol";
import {IVotes} from "@openzeppelin/contracts/governance/utils/IVotes.sol";
import {TimelockController} from "@openzeppelin/contracts/governance/TimelockController.sol";
import {CoreRef} from "@src/core/CoreRef.sol";
import {CoreRoles} from "@src/core/CoreRoles.sol";

/// @title Governor for on-chain governance of Ethereum Credit Guild, based on the OZ implementation.
/// This governor is specifically designed for adding veto capabilities :
/// Token holders cannot propose() arbitrary actions, they have to create the proposals
/// through the createVeto() function, and this governor will only be able to execute the
/// action of cancelling an action in the linked TimelockController if the veto vote passes.
/// Token holders can only vote against an action that is queued in the linked TimelockController.
/// When enough against votes (above veto quorum) are cast, the veto vote is considered successful,
/// and this governor can early-execute the proposal of cancelling the action in the linked
/// TimelockController, without having to wait the end of a voting period.
/// After the action has been queued in the linked TimelockController for enough time to be
/// executed, the veto vote is considered failed and the action cannot be cancelled anymore.
/// @author eswak
contract GuildVetoGovernor is CoreRef, Governor, GovernorVotes {
    /// @notice Private storage variable for quorum (the minimum number of votes needed for a vote to pass).
    uint256 private _quorum;

    /// @notice Emitted when quorum is updated.
    event QuorumUpdated(uint256 oldQuorum, uint256 newQuorum);

    constructor(
        address _core,
        address initialTimelock,
        address _token,
        uint256 initialQuorum
    )
        CoreRef(_core)
        Governor("ECG Veto Governor")
        GovernorVotes(IVotes(_token))
    {
        _setQuorum(initialQuorum);
        _updateTimelock(initialTimelock);
    }

    /// ------------------------------------------------------------------------
    /// Quorum Management
    /// ------------------------------------------------------------------------

    /**
     * @dev Public accessor to check the minimum number of votes needed for a vote to pass.
     */
    function quorum(
        uint256 /* blockNumber*/
    ) public view override returns (uint256) {
        return _quorum;
    }

    /// @notice Adjust quorum, restricted to Core GOVERNOR role.
    function setQuorum(
        uint256 newQuorum
    ) public onlyCoreRole(CoreRoles.GOVERNOR) {
        _setQuorum(newQuorum);
    }

    /**
     * @dev Internal setter for the proposal quorum.
     *
     * Emits a {QuorumUpdated} event.
     */
    function _setQuorum(uint256 newQuorum) internal virtual {
        emit QuorumUpdated(_quorum, newQuorum);
        _quorum = newQuorum;
    }

    /// ------------------------------------------------------------------------
    /// Timelock Management
    /// ------------------------------------------------------------------------

    /**
     * @dev Emitted when the timelock controller used for proposal execution is modified.
     */
    event TimelockChange(address oldTimelock, address newTimelock);

    /// @notice the timelock linked to this veto governor
    address public timelock;

    /// @notice mapping of proposalId (in this Governor) to timelockId (action ID in
    /// the timelock linked to this governor).
    mapping(uint256 => bytes32) private _timelockIds;

    /// @notice Set the timelock this veto governor can cancel from.
    function updateTimelock(
        address newTimelock
    ) external onlyCoreRole(CoreRoles.GOVERNOR) {
        _updateTimelock(newTimelock);
    }

    function _updateTimelock(address newTimelock) private {
        emit TimelockChange(timelock, newTimelock);
        timelock = newTimelock;
    }

    /// ------------------------------------------------------------------------
    /// Vote counting
    /// ------------------------------------------------------------------------

    /**
     * @dev Supported vote types. Matches Governor Bravo ordering.
     */
    enum VoteType {
        Against,
        For,
        Abstain
    }

    struct ProposalVote {
        uint256 againstVotes;
        uint256 forVotes;
        uint256 abstainVotes;
        mapping(address => bool) hasVoted;
    }

    mapping(uint256 => ProposalVote) private _proposalVotes;

    /**
     * @dev See {IGovernor-COUNTING_MODE}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function COUNTING_MODE()
        public
        pure
        virtual
        override
        returns (string memory)
    {
        return "support=bravo&quorum=against";
    }

    /**
     * @dev See {IGovernor-hasVoted}.
     */
    function hasVoted(
        uint256 proposalId,
        address account
    ) public view virtual override returns (bool) {
        return _proposalVotes[proposalId].hasVoted[account];
    }

    /**
     * @dev Accessor to the internal vote counts.
     */
    function proposalVotes(
        uint256 proposalId
    )
        public
        view
        virtual
        returns (uint256 againstVotes, uint256 forVotes, uint256 abstainVotes)
    {
        // againstVotes are supporting the execution of Veto
        againstVotes = _proposalVotes[proposalId].againstVotes;
        // no forVotes can be cast in the Veto module, keep 0 value
        forVotes = 0;
        // no abstainVotes can be cast in the Veto module, keep 0 value
        abstainVotes = 0;
    }

    /**
     * @dev See {Governor-_quorumReached}.
     */
    function _quorumReached(
        uint256 proposalId
    ) internal view virtual override returns (bool) {
        ProposalVote storage proposalvote = _proposalVotes[proposalId];

        return
            quorum(proposalSnapshot(proposalId)) <= proposalvote.againstVotes;
    }

    /**
     * @dev Veto votes are always considered "successful" in this part of the logic, as there is no opposition
     * between 'for' and 'against' votes, since people cannot vote 'for'. For a veto to be considered successful,
     * it only needs to reach quorum.
     */
    function _voteSucceeded(
        uint256 /* proposalId*/
    ) internal pure virtual override returns (bool) {
        return true;
    }

    /**
     * @dev See {Governor-_countVote}. In this module, the support follows the `VoteType` enum (from Governor Bravo).
     */
    function _countVote(
        uint256 proposalId,
        address account,
        uint8 support,
        uint256 weight,
        bytes memory // params
    ) internal virtual override {
        ProposalVote storage proposalvote = _proposalVotes[proposalId];

        require(
            !proposalvote.hasVoted[account],
            "GuildVetoGovernor: vote already cast"
        );
        proposalvote.hasVoted[account] = true;

        if (support == uint8(VoteType.Against)) {
            proposalvote.againstVotes += weight;
        } else {
            revert("GuildVetoGovernor: can only vote against in veto proposals");
        }
    }

    /// ------------------------------------------------------------------------
    /// Public functions override
    /// ------------------------------------------------------------------------

    /// @dev no voting delay between veto proposal and veto voting period.
    function votingDelay() public pure override returns (uint256) {
        return 0;
    }

    /// @dev voting period is unused, it is a duration in blocks for the vote
    /// but the timestamp of the action in the timelock is used to know if the
    /// vote period is over (after action is ready in the timelock, the veto
    /// vote failed).
    function votingPeriod() public pure override returns (uint256) {
        return 2425847; // ~1 year with 1 block every 13s
    }

    /// @notice State of a given proposal
    /// The state can be one of:
    /// - ProposalState.Pending   (0) Lasts only during the block where the veto proposal has been created.
    /// - ProposalState.Active    (1) If action is pending in the timelock and veto quorum has not been reached yet.
    /// - ProposalState.Canceled  (2) If a veto was created but the timelock action has been cancelled through another
    ///   mean before the veto vote succeeded. The internal _cancel() function is not reachable by another mean (no
    ///   public cancel() function), so this is the only case where a proposal will have Canceled status.
    /// - ProposalState.Defeated  (3) If proposal already executed or is ready to execute in the timelock.
    /// - ProposalState.Succeeded (4) If action is pending in the timelock and veto quorum has been reached. Veto can be executed instantly.
    /// - ProposalState.Executed  (7) If a veto successfully executed.
    /// note that veto proposals have a quorum that works with 'against' votes, and that only 'against' votes can be
    /// cast in this veto governor.
    function state(
        uint256 proposalId
    ) public view override returns (ProposalState) {
        ProposalState status = super.state(proposalId);
        bytes32 queueid = _timelockIds[proposalId];

        // @dev all proposals that are in this Governor's state should have been created
        // by the createVeto() method, and therefore should have _timelockIds set, so this
        // condition check is an invalid state that should never be reached.
        assert(queueid != bytes32(0));

        // Proposal already executed and stored in state
        if (status == ProposalState.Executed) {
            return ProposalState.Executed;
        }
        // Proposal cannot be Canceled because there is no public cancel() function.
        // Vote has just been created, still in waiting period
        if (status == ProposalState.Pending) {
            return ProposalState.Pending;
        }

        // at this stage, status from super can be one of: Active, Succeeded, Defeated
        // Read timestamp in the timelock to determine the state of the proposal
        uint256 timelockOperationTimestamp = TimelockController(
            payable(timelock)
        ).getTimestamp(queueid);

        // proposal already cleared from the timelock by something else
        if (timelockOperationTimestamp == 0) {
            return ProposalState.Canceled;
        }
        // proposal already executed in the timelock
        if (timelockOperationTimestamp == 1) {
            return ProposalState.Defeated;
        }

        // proposal still in waiting period in the timelock
        if (timelockOperationTimestamp > block.timestamp) {
            // ready to veto
            // no need for "&& _voteSucceeded(proposalId)" in condition because
            // veto votes are always succeeded (there is no tallying for 'for'
            // votes against 'against' votes), the only condition is the quorum.
            if (_quorumReached(proposalId)) {
                return ProposalState.Succeeded;
            }
            // need more votes to veto
            else {
                return ProposalState.Active;
            }
        }
        // proposal is ready to execute in the timelock, the veto
        // vote did not reach quorum in time.
        else {
            return ProposalState.Defeated;
        }
    }

    /// @dev override to prevent arbitrary calls to be proposed
    function propose(
        address[] memory /* targets*/,
        uint256[] memory /* values*/,
        bytes[] memory /* calldatas*/,
        string memory /* description*/
    ) public pure override returns (uint256) {
        revert("GuildVetoGovernor: cannot propose arbitrary actions");
    }

    /// @notice Propose a governance action to veto (cancel) a target action ID in the
    /// governor's linked timelock.
    function createVeto(bytes32 timelockId) external returns (uint256) {
        // Check that the operation is pending in the timelock
        uint256 timelockExecutionTime = TimelockController(payable(timelock))
            .getTimestamp(timelockId);
        require(
            timelockExecutionTime > 1,
            "GuildVetoGovernor: action must be pending"
        );

        // Build proposal data
        (
            address[] memory targets,
            uint256[] memory values,
            bytes[] memory calldatas,
            string memory description
        ) = _getVetoCalls(timelockId);

        uint256 proposalId = super.propose(
            targets,
            values,
            calldatas,
            description
        );

        // Save mapping between proposalId and timelockId
        _timelockIds[proposalId] = timelockId;

        return proposalId;
    }

    /// @notice Execute a governance action to veto (cancel) a target action ID in the
    /// governor's linked timelock.
    /// @dev the standard execute() function can also be used for this, and the function
    /// is only added for convenience.
    function executeVeto(bytes32 timelockId) external returns (uint256) {
        // Build proposal data
        (
            address[] memory targets,
            uint256[] memory values,
            bytes[] memory calldatas,
            string memory description
        ) = _getVetoCalls(timelockId);
        // Execute
        return
            super.execute(
                targets,
                values,
                calldatas,
                keccak256(bytes(description))
            );
    }

    function _getVetoCalls(
        bytes32 timelockId
    )
        internal
        view
        returns (
            address[] memory targets,
            uint256[] memory values,
            bytes[] memory calldatas,
            string memory description
        )
    {
        targets = new address[](1);
        targets[0] = timelock;
        values = new uint256[](1); // 0 eth
        calldatas = new bytes[](1);
        calldatas[0] = abi.encodeWithSelector(
            TimelockController.cancel.selector,
            timelockId
        );
        description = string.concat(
            "Veto proposal for ",
            string(abi.encodePacked(timelockId))
        );
    }
}