diff --git a/bridges/modules/grandpa/src/lib.rs b/bridges/modules/grandpa/src/lib.rs
index 10b60878302e8..f9c3ab68a06f2 100644
--- a/bridges/modules/grandpa/src/lib.rs
+++ b/bridges/modules/grandpa/src/lib.rs
@@ -176,11 +176,12 @@ pub mod pallet {
 			justification.votes_ancestries.len().saturated_into(),
 		))]
 		pub fn submit_finality_proof(
-			_origin: OriginFor<T>,
+			origin: OriginFor<T>,
 			finality_target: Box<BridgedHeader<T, I>>,
 			justification: GrandpaJustification<BridgedHeader<T, I>>,
 		) -> DispatchResultWithPostInfo {
 			Self::ensure_not_halted().map_err(Error::<T, I>::BridgeModule)?;
+			ensure_signed(origin)?;
 
 			let (hash, number) = (finality_target.hash(), *finality_target.number());
 			log::trace!(
@@ -1414,4 +1415,23 @@ mod tests {
 	fn maybe_headers_to_keep_returns_correct_value() {
 		assert_eq!(MaybeHeadersToKeep::<TestRuntime, ()>::get(), Some(mock::HeadersToKeep::get()));
 	}
+
+	#[test]
+	fn submit_finality_proof_requires_signed_origin() {
+		run_test(|| {
+			initialize_substrate_bridge();
+
+			let header = test_header(1);
+			let justification = make_default_justification(&header);
+
+			assert_noop!(
+				Pallet::<TestRuntime>::submit_finality_proof(
+					RuntimeOrigin::root(),
+					Box::new(header),
+					justification,
+				),
+				DispatchError::BadOrigin,
+			);
+		})
+	}
 }
diff --git a/bridges/modules/parachains/src/lib.rs b/bridges/modules/parachains/src/lib.rs
index b17b52163d857..52b436b820712 100644
--- a/bridges/modules/parachains/src/lib.rs
+++ b/bridges/modules/parachains/src/lib.rs
@@ -307,12 +307,13 @@ pub mod pallet {
 			parachains.len() as _,
 		))]
 		pub fn submit_parachain_heads(
-			_origin: OriginFor<T>,
+			origin: OriginFor<T>,
 			at_relay_block: (RelayBlockNumber, RelayBlockHash),
 			parachains: Vec<(ParaId, ParaHash)>,
 			parachain_heads_proof: ParaHeadsProof,
 		) -> DispatchResultWithPostInfo {
 			Self::ensure_not_halted().map_err(Error::<T, I>::BridgeModule)?;
+			ensure_signed(origin)?;
 
 			// we'll need relay chain header to verify that parachains heads are always increasing.
 			let (relay_block_number, relay_block_hash) = at_relay_block;
@@ -417,7 +418,7 @@ pub mod pallet {
 					});
 
 				// we're refunding weight if update has not happened and if pruning has not happened
-				let is_update_happened = matches!(update_result, Ok(_));
+				let is_update_happened = update_result.is_ok();
 				if !is_update_happened {
 					actual_weight = actual_weight.saturating_sub(
 						WeightInfoOf::<T, I>::parachain_head_storage_write_weight(
@@ -1579,4 +1580,25 @@ pub(crate) mod tests {
 			Some(mock::TOTAL_PARACHAINS * mock::HeadsToKeep::get()),
 		);
 	}
+
+	#[test]
+	fn submit_finality_proof_requires_signed_origin() {
+		run_test(|| {
+			let (state_root, proof, parachains) =
+				prepare_parachain_heads_proof::<RegularParachainHeader>(vec![(1, head_data(1, 0))]);
+
+			initialize(state_root);
+
+			// `submit_parachain_heads()` should fail when the pallet is halted.
+			assert_noop!(
+				Pallet::<TestRuntime>::submit_parachain_heads(
+					RuntimeOrigin::root(),
+					(0, test_relay_header(0, state_root).hash()),
+					parachains,
+					proof,
+				),
+				DispatchError::BadOrigin
+			);
+		})
+	}
 }