diff --git a/api/src/quest/domain/usecases/get-quest-results-for-campaign-participation.js b/api/src/quest/domain/usecases/get-quest-results-for-campaign-participation.js
index 30c89b5ca6e..daa3eb1d964 100644
--- a/api/src/quest/domain/usecases/get-quest-results-for-campaign-participation.js
+++ b/api/src/quest/domain/usecases/get-quest-results-for-campaign-participation.js
@@ -16,11 +16,13 @@ export const getQuestResultsForCampaignParticipation = async ({
 
   if (!eligibility) return [];
 
-  eligibility.campaignParticipations.targetProfileIds = [
-    // getTargetProfileForCampaignParticipation returns null but this usecase is used for campaign participation result page for now, so the campaign participation ID always exists
-    // if this usecase is to be used in another context, the edge case must be handled
-    eligibility.getTargetProfileForCampaignParticipation(campaignParticipationId),
-  ];
+  /*
+  This effectively overrides the existing campaignParticipations property with a new getter that always returns the updated targetProfileIds array based on the provided campaignParticipationId.
+  We can't just reassign the getter with the new value, because the getter will still be called and the new value would be ignored
+  */
+  Object.defineProperty(eligibility, 'campaignParticipations', {
+    get: () => ({ targetProfileIds: [eligibility.getTargetProfileForCampaignParticipation(campaignParticipationId)] }),
+  });
 
   const questResults = [];
   for (const quest of quests) {
diff --git a/api/tests/quest/integration/domain/usecases/get-quest-results-for-campaign-participation_test.js b/api/tests/quest/integration/domain/usecases/get-quest-results-for-campaign-participation_test.js
index 8878a43969f..1acde3d74f4 100644
--- a/api/tests/quest/integration/domain/usecases/get-quest-results-for-campaign-participation_test.js
+++ b/api/tests/quest/integration/domain/usecases/get-quest-results-for-campaign-participation_test.js
@@ -35,4 +35,55 @@ describe('Quest | Integration | Domain | Usecases | getQuestResultsForCampaignPa
     expect(result[0].id).to.equal(questId);
     expect(result[0].reward.id).to.equal(rewardId);
   });
+
+  it('should not return quest results for other campaign participation', async function () {
+    // given
+    const organizationId = databaseBuilder.factory.buildOrganization({ type: 'SCO' }).id;
+    const { id: organizationLearnerId, userId } = databaseBuilder.factory.buildOrganizationLearner({ organizationId });
+
+    const { id: notEligibleParticipationId } = databaseBuilder.factory.buildCampaignParticipation({
+      organizationLearnerId,
+      userId,
+    });
+    const targetProfileId = databaseBuilder.factory.buildTargetProfile({ ownerOrganizationId: organizationId }).id;
+    const campaignId = databaseBuilder.factory.buildCampaign({ organizationId, targetProfileId }).id;
+    databaseBuilder.factory.buildCampaignParticipation({
+      organizationLearnerId,
+      campaignId,
+      userId,
+    });
+    const rewardId = databaseBuilder.factory.buildAttestation().id;
+    databaseBuilder.factory.buildQuest({
+      rewardType: 'attestations',
+      rewardId,
+      eligibilityRequirements: [
+        {
+          type: 'organization',
+          data: {
+            type: 'SCO',
+          },
+          comparison: COMPARISON.ALL,
+        },
+        {
+          type: 'campaignParticipations',
+          data: {
+            targetProfileIds: [targetProfileId],
+          },
+          comparison: COMPARISON.ALL,
+        },
+      ],
+      successRequirements: [],
+    }).id;
+
+    await databaseBuilder.commit();
+
+    // when
+    const result = await usecases.getQuestResultsForCampaignParticipation({
+      userId,
+      campaignParticipationId: notEligibleParticipationId,
+    });
+
+    // then
+    expect(result).to.be.empty;
+  });
 });