diff --git a/app/V1Module/presenters/base/BasePresenter.php b/app/V1Module/presenters/base/BasePresenter.php
index 544f29ef2..cefd811b4 100644
--- a/app/V1Module/presenters/base/BasePresenter.php
+++ b/app/V1Module/presenters/base/BasePresenter.php
@@ -257,6 +257,17 @@ private function processParamsLoose(array $paramData)
             } else {
                 $param->conformsToDefinition($paramValue);
             }
+
+            // Path and query parameter might need patching, so they have correct type for
+            // being injected into the presenter method.
+            if (
+                $param->type === Type::Path || $param->type === Type::Query
+                && array_key_exists($param->name, $this->params)
+            ) {
+                foreach ($param->validators as $validator) {
+                    $validator->patchQueryParameter($this->params[$param->name]);
+                }
+            }
         }
     }
 
diff --git a/app/helpers/MetaFormats/Validators/BaseValidator.php b/app/helpers/MetaFormats/Validators/BaseValidator.php
index c1c09f9fd..1b5552933 100644
--- a/app/helpers/MetaFormats/Validators/BaseValidator.php
+++ b/app/helpers/MetaFormats/Validators/BaseValidator.php
@@ -65,4 +65,16 @@ public function validate(mixed $value): bool
         // return false by default to enforce overriding in derived types
         return false;
     }
+
+    /**
+     * Patches the query/path parameter value after successful validation.
+     * This is useful for special data types that needs to be converted to a different type before being used
+     * in the presenter method (e.g., convert strings like "true"/"false" to booleans).
+     * Note: this method is not called for values that did not pass validation.
+     * @param mixed $value The value to be patched. Passed by reference, so it can be modified by the method.
+     */
+    public function patchQueryParameter(mixed &$value): void
+    {
+        // no-op by default, can be overridden by validators that need to change the value before validation
+    }
 }
diff --git a/app/helpers/MetaFormats/Validators/VArray.php b/app/helpers/MetaFormats/Validators/VArray.php
index 706800641..9a8fe2f28 100644
--- a/app/helpers/MetaFormats/Validators/VArray.php
+++ b/app/helpers/MetaFormats/Validators/VArray.php
@@ -102,4 +102,13 @@ public function validate(mixed $value): bool
         }
         return true;
     }
+
+    public function patchQueryParameter(mixed &$value): void
+    {
+        if (is_array($value) && $this->nestedValidator !== null) {
+            foreach ($value as &$element) {
+                $this->nestedValidator->patchQueryParameter($element);
+            }
+        }
+    }
 }
diff --git a/app/helpers/MetaFormats/Validators/VBool.php b/app/helpers/MetaFormats/Validators/VBool.php
index 3f55e63c2..d3913740b 100644
--- a/app/helpers/MetaFormats/Validators/VBool.php
+++ b/app/helpers/MetaFormats/Validators/VBool.php
@@ -22,14 +22,29 @@ public function validate(mixed $value): bool
 
         if (!$this->strict) {
             // FILTER_VALIDATE_BOOL is not used because it additionally allows "on", "yes", "off", "no" and ""
-            return $value === 0
-                || $value === 1
-                || $value === "0"
-                || $value === "1"
-                || $value === "false"
-                || $value === "true";
+
+            if ($value === 0 || $value === 1) {
+                return true;
+            }
+
+            if (is_string($value)) {
+                $lower = strtolower(trim($value));
+                return $lower === "0"
+                    || $lower === "1"
+                    || $lower === "false"
+                    || $lower === "true";
+            }
         }
 
         return false;
     }
+
+    public function patchQueryParameter(mixed &$value): void
+    {
+        if (is_string($value)) {
+            $value = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
+        } else {
+            $value = (bool)$value;
+        }
+    }
 }
diff --git a/app/model/repository/PlagiarismDetectionBatches.php b/app/model/repository/PlagiarismDetectionBatches.php
index 06e21bec4..14c85b27e 100644
--- a/app/model/repository/PlagiarismDetectionBatches.php
+++ b/app/model/repository/PlagiarismDetectionBatches.php
@@ -34,8 +34,9 @@ public function findByToolAndSolution(?string $detectionTool, ?AssignmentSolutio
             $sub = $qb->getEntityManager()->createQueryBuilder()
                 ->select("ds")->from(PlagiarismDetectedSimilarity::class, "ds");
             $sub->andWhere("ds.batch = b.id")
-                ->andWhere("ds.testedSolution = :sid")->setParameter("sid", $solution->getId());
-            $qb->andWhere($qb->expr()->exists($sub->getDQL()));
+                ->andWhere("ds.testedSolution = :sid");
+            $qb->andWhere($qb->expr()->exists($sub->getDQL()))
+                ->setParameter("sid", $solution->getId());
         }
         $qb->orderBy("b.createdAt", "DESC");
         return $qb->getQuery()->getResult();