diff --git a/models/issues/issue_stats.go b/models/issues/issue_stats.go
index 39326616f8..dc634cf00e 100644
--- a/models/issues/issue_stats.go
+++ b/models/issues/issue_stats.go
@@ -107,7 +107,7 @@ func GetIssueStats(ctx context.Context, opts *IssuesOptions) (*IssueStats, error
 		accum.YourRepositoriesCount += stats.YourRepositoriesCount
 		accum.AssignCount += stats.AssignCount
 		accum.CreateCount += stats.CreateCount
-		accum.OpenCount += stats.MentionCount
+		accum.MentionCount += stats.MentionCount
 		accum.ReviewRequestedCount += stats.ReviewRequestedCount
 		accum.ReviewedCount += stats.ReviewedCount
 		i = chunk
diff --git a/models/issues/issue_stats_test.go b/models/issues/issue_stats_test.go
new file mode 100644
index 0000000000..fda75a6b47
--- /dev/null
+++ b/models/issues/issue_stats_test.go
@@ -0,0 +1,34 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package issues_test
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetIssueStats(t *testing.T) {
+	require.NoError(t, unittest.PrepareTestDatabase())
+
+	ids, err := issues_model.GetIssueIDsByRepoID(db.DefaultContext, 1)
+	require.NoError(t, err)
+
+	stats, err := issues_model.GetIssueStats(db.DefaultContext, &issues_model.IssuesOptions{IssueIDs: ids})
+	require.NoError(t, err)
+
+	assert.Equal(t, int64(4), stats.OpenCount)
+	assert.Equal(t, int64(1), stats.ClosedCount)
+	assert.Equal(t, int64(0), stats.YourRepositoriesCount)
+	assert.Equal(t, int64(0), stats.AssignCount)
+	assert.Equal(t, int64(0), stats.CreateCount)
+	assert.Equal(t, int64(0), stats.MentionCount)
+	assert.Equal(t, int64(0), stats.ReviewRequestedCount)
+	assert.Equal(t, int64(0), stats.ReviewedCount)
+}
diff --git a/release-notes/8.0.0/fix/4124.md b/release-notes/8.0.0/fix/4124.md
new file mode 100644
index 0000000000..47c65e2ce9
--- /dev/null
+++ b/release-notes/8.0.0/fix/4124.md
@@ -0,0 +1 @@
+Fixed bug in `GetIssueStats`