diff --git a/src/server/game/Battlegrounds/Battleground.cpp b/src/server/game/Battlegrounds/Battleground.cpp
index ece6848..875b9d1 100644
--- a/src/server/game/Battlegrounds/Battleground.cpp
+++ b/src/server/game/Battlegrounds/Battleground.cpp
@@ -860,9 +860,11 @@ void Battleground::EndBattleground(uint32 winner)
 
         if (isBattleground() && sWorld->getBoolConfig(CONFIG_BATTLEGROUND_STORE_STATISTICS_ENABLE))
         {
-            stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_PVPSTATS_PLAYER);
             BattlegroundScoreMap::const_iterator score = PlayerScores.find(player->GetGUID());
+            if (score == PlayerScores.end()) // pas de score enregistre pour ce joueur (ArgusCore e875f9f4)
+                continue;
 
+            stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_PVPSTATS_PLAYER);
             stmt->setUInt32(0,  battlegroundId);
             stmt->setUInt64(1,  player->GetGUID().GetCounter());
             stmt->setBool  (2,  team == winner);
diff --git a/src/server/game/Guilds/Guild.cpp b/src/server/game/Guilds/Guild.cpp
index 08bc8a1..aa8d27e 100644
--- a/src/server/game/Guilds/Guild.cpp
+++ b/src/server/game/Guilds/Guild.cpp
@@ -1573,6 +1573,14 @@ void Guild::HandleSetNewGuildMaster(WorldSession* session, std::string const& na
 
 void Guild::HandleSetBankTabInfo(WorldSession* session, uint8 tabId, std::string const& name, std::string const& icon)
 {
+    // seul le maitre de guilde peut renommer/re-iconer un onglet (comme l achat d onglet) (ArgusCore 2288f107)
+    if (GetLeaderGUID() != session->GetPlayer()->GetGUID())
+    {
+        TC_LOG_ERROR("guild", "Guild::HandleSetBankTabInfo: Joueur %s sans droits de chef a tente de modifier l onglet %u.",
+                       session->GetPlayerInfo().c_str(), tabId);
+        return;
+    }
+
     BankTab* tab = GetBankTab(tabId);
     if (!tab)
     {
@@ -1934,6 +1942,17 @@ void Guild::HandleSetMemberRank(WorldSession* session, ObjectGuid targetGuid, Ob
         return;
     }
 
+    // avoir PROMOTE/DEMOTE ne permet pas d agir sur un membre de rang egal/superieur, ni d attribuer un rang egal/superieur au sien (ArgusCore f94d82dc)
+    if (Member const* memberMe = GetMember(player->GetGUID()))
+    {
+        uint32 myRankId = memberMe->GetRankId();
+        if (member->GetRankId() <= myRankId || rank <= myRankId)
+        {
+            SendCommandResult(session, type, ERR_GUILD_RANK_TOO_HIGH_S);
+            return;
+        }
+    }
+
     // Player cannot promote himself
     if (member->IsSamePlayer(player->GetGUID()))
     {
diff --git a/src/server/game/Handlers/LootHandler.cpp b/src/server/game/Handlers/LootHandler.cpp
index f7a54b4..107836f 100644
--- a/src/server/game/Handlers/LootHandler.cpp
+++ b/src/server/game/Handlers/LootHandler.cpp
@@ -222,6 +222,8 @@ void WorldSession::HandleLootMoneyOpcode(WorldPackets::Loot::LootMoney& /*packet
                     playersNear.push_back(member);
             }
 
+            if (playersNear.empty()) // division par zero si personne a portee (ArgusCore e8196eed)
+                return;
             uint32 goldPerPlayer = uint32((loot->gold) / (playersNear.size()));
 
             for (std::vector<Player*>::const_iterator i = playersNear.begin(); i != playersNear.end(); ++i)
diff --git a/src/server/game/Handlers/PetHandler.cpp b/src/server/game/Handlers/PetHandler.cpp
index f782e3a..da0a043 100644
--- a/src/server/game/Handlers/PetHandler.cpp
+++ b/src/server/game/Handlers/PetHandler.cpp
@@ -476,6 +476,9 @@ void WorldSession::HandlePetSetAction(WorldPackets::Pet::PetSetAction& packet)
     }
 
     uint32 position = packet.Index;
+    // position vient du client (CMSG_PET_SET_ACTION) ; PetActionBar est un tableau fixe -> ecriture hors bornes (ArgusCore fec060ab)
+    if (position >= MAX_UNIT_ACTION_BAR_INDEX)
+        return;
     uint32 actionData = packet.Action;
 
     uint32 spell_id = UNIT_ACTION_BUTTON_ACTION(actionData);
@@ -596,7 +599,7 @@ void WorldSession::HandlePetAbandon(WorldPackets::Pet::PetAbandon& packet)
 
     // pet/charmed
     Creature* pet = ObjectAccessor::GetCreatureOrPetOrVehicle(*_player, packet.Pet);
-    if (pet && pet->ToPet() && pet->ToPet()->getPetType() == HUNTER_PET)
+    if (pet && pet->ToPet() && pet->ToPet()->getPetType() == HUNTER_PET && pet->GetOwnerGUID() == _player->GetGUID()) // proprietaire uniquement (ArgusCore fec060ab)
     {
         _player->RemovePet((Pet*)pet, PET_SAVE_AS_DELETED);
     }
diff --git a/src/server/game/Handlers/VehicleHandler.cpp b/src/server/game/Handlers/VehicleHandler.cpp
index 5d0e7a6..5a74713 100644
--- a/src/server/game/Handlers/VehicleHandler.cpp
+++ b/src/server/game/Handlers/VehicleHandler.cpp
@@ -42,6 +42,8 @@ void WorldSession::HandleRequestVehiclePrevSeat(WorldPackets::Vehicle::RequestVe
         return;
 
     VehicleSeatEntry const* seat = GetPlayer()->GetVehicle()->GetSeatForPassenger(GetPlayer());
+    if (!seat) // le joueur peut ne pas avoir de siege resolu (ArgusCore 392466b1)
+        return;
     if (!seat->CanSwitchFromSeat())
     {
         TC_LOG_ERROR("network", "HandleRequestVehiclePrevSeat: %s tried to switch seats but current seatflags %u don't permit that.",
@@ -59,6 +61,8 @@ void WorldSession::HandleRequestVehicleNextSeat(WorldPackets::Vehicle::RequestVe
         return;
 
     VehicleSeatEntry const* seat = GetPlayer()->GetVehicle()->GetSeatForPassenger(GetPlayer());
+    if (!seat) // le joueur peut ne pas avoir de siege resolu (ArgusCore 392466b1)
+        return;
     if (!seat->CanSwitchFromSeat())
     {
         TC_LOG_ERROR("network", "HandleRequestVehicleNextSeat: %s tried to switch seats but current seatflags %u don't permit that.",
@@ -76,6 +80,8 @@ void WorldSession::HandleMoveChangeVehicleSeats(WorldPackets::Vehicle::MoveChang
         return;
 
     VehicleSeatEntry const* seat = GetPlayer()->GetVehicle()->GetSeatForPassenger(GetPlayer());
+    if (!seat) // le joueur peut ne pas avoir de siege resolu (ArgusCore 392466b1)
+        return;
     if (!seat->CanSwitchFromSeat())
     {
         TC_LOG_ERROR("network", "HandleMoveChangeVehicleSeats: %s tried to switch seats but current seatflags %u don't permit that.",
@@ -105,6 +111,8 @@ void WorldSession::HandleRequestVehicleSwitchSeat(WorldPackets::Vehicle::Request
         return;
 
     VehicleSeatEntry const* seat = GetPlayer()->GetVehicle()->GetSeatForPassenger(GetPlayer());
+    if (!seat) // le joueur peut ne pas avoir de siege resolu (ArgusCore 392466b1)
+        return;
     if (!seat->CanSwitchFromSeat())
     {
         TC_LOG_ERROR("network", "HandleRequestVehicleSwitchSeat: %s tried to switch seats but current seatflags %u don't permit that.",
diff --git a/src/server/game/Spells/Auras/SpellAuraEffects.cpp b/src/server/game/Spells/Auras/SpellAuraEffects.cpp
index 5002601..d7ba2d0 100644
--- a/src/server/game/Spells/Auras/SpellAuraEffects.cpp
+++ b/src/server/game/Spells/Auras/SpellAuraEffects.cpp
@@ -5838,7 +5838,8 @@ void AuraEffect::HandlePeriodicDamageAurasTick(Unit* target, Unit* caster) const
         {
             WeaponAttackType attackType = GetSpellInfo()->GetAttackType();
 
-            int32 weaponDamage = CalculatePct(caster->CalculateDamage(attackType, false, true), GetAmount());
+            // le degat d arme exige un caster vivant ; s il a quitte la map, ce tick ne fait rien au lieu de crasher (ArgusCore b456b7f7)
+            int32 weaponDamage = caster ? CalculatePct(caster->CalculateDamage(attackType, false, true), GetAmount()) : 0;
 
             // Add melee damage bonuses (also check for negative)
             uint32 damageBonusDone = caster->MeleeDamageBonusDone(target, std::max(weaponDamage, 0), attackType, GetSpellInfo());
diff --git a/src/server/game/Spells/Spell.cpp b/src/server/game/Spells/Spell.cpp
index bae87d0..3efce4f 100644
--- a/src/server/game/Spells/Spell.cpp
+++ b/src/server/game/Spells/Spell.cpp
@@ -1533,7 +1533,12 @@ void Spell::SelectImplicitCasterDestTargets(SpellEffIndex effIndex, SpellImplici
 
 void Spell::SelectImplicitTargetDestTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType)
 {
-    ASSERT(m_targets.GetObjectTarget() && "Spell::SelectImplicitTargetDestTargets - no explicit object target available!");
+    // Un ligne spell_effect mal formee ne doit pas crasher le serveur : on log et on saute (ArgusCore a00b85b2)
+    if (!m_targets.GetObjectTarget())
+    {
+        TC_LOG_ERROR("spells", "Spell::SelectImplicitTargetDestTargets: spell %u effect %u sans cible objet explicite; selection de destination ignoree.", m_spellInfo->Id, uint32(effIndex));
+        return;
+    }
     WorldObject* target = m_targets.GetObjectTarget();
 
     SpellDestination dest(*target);