UseCounterPageLoadMetricsObserver::GetAllowedUkmFeatures() {
  static base::NoDestructor<UseCounterPageLoadMetricsObserver::UkmFeatureList>
      opt_in_features(std::initializer_list<WebFeature>({
          WebFeature::kNavigatorVibrate,
          WebFeature::kNavigatorVibrateSubFrame,
          WebFeature::kTouchEventPreventedNoTouchAction,
          WebFeature::kTouchEventPreventedForcedDocumentPassiveNoTouchAction,
          WebFeature::kDataUriHasOctothorpe,
          WebFeature::kApplicationCacheManifestSelectInsecureOrigin,
          WebFeature::kApplicationCacheManifestSelectSecureOrigin,
          WebFeature::kMixedContentAudio,
          WebFeature::kMixedContentImage,
          WebFeature::kMixedContentVideo,
          WebFeature::kMixedContentPlugin,
          WebFeature::kOpenerNavigationWithoutGesture,
          WebFeature::kUsbRequestDevice,
          WebFeature::kXMLHttpRequestSynchronous,
          WebFeature::kPaymentHandler,
          WebFeature::kPaymentRequestShowWithoutGesture,
          WebFeature::kHTMLImports,
          WebFeature::kHTMLImportsHasStyleSheets,
          WebFeature::kElementCreateShadowRoot,
          WebFeature::kDocumentRegisterElement,
          WebFeature::kCredentialManagerCreatePublicKeyCredential,
          WebFeature::kCredentialManagerGetPublicKeyCredential,
          WebFeature::kCredentialManagerMakePublicKeyCredentialSuccess,
          WebFeature::kCredentialManagerGetPublicKeyCredentialSuccess,
          WebFeature::kV8AudioContext_Constructor,
          WebFeature::kElementAttachShadow,
          WebFeature::kElementAttachShadowOpen,
          WebFeature::kElementAttachShadowClosed,
          WebFeature::kCustomElementRegistryDefine,
          WebFeature::kTextToSpeech_Speak,
          WebFeature::kTextToSpeech_SpeakDisallowedByAutoplay,
          WebFeature::kCSSEnvironmentVariable,
          WebFeature::kCSSEnvironmentVariable_SafeAreaInsetTop,
          WebFeature::kCSSEnvironmentVariable_SafeAreaInsetLeft,
          WebFeature::kCSSEnvironmentVariable_SafeAreaInsetRight,
          WebFeature::kCSSEnvironmentVariable_SafeAreaInsetBottom,
          WebFeature::kMediaControlsDisplayCutoutGesture,
          WebFeature::kPolymerV1Detected,
          WebFeature::kPolymerV2Detected,
          WebFeature::kFullscreenSecureOrigin,
          WebFeature::kFullscreenInsecureOrigin,
          WebFeature::kPrefixedVideoEnterFullscreen,
          WebFeature::kPrefixedVideoExitFullscreen,
          WebFeature::kPrefixedVideoEnterFullScreen,
          WebFeature::kPrefixedVideoExitFullScreen,
          WebFeature::kDocumentLevelPassiveDefaultEventListenerPreventedWheel,
          WebFeature::kDocumentDomainBlockedCrossOriginAccess,
          WebFeature::kDocumentDomainEnabledCrossOriginAccess,
          WebFeature::kSuppressHistoryEntryWithoutUserGesture,
          WebFeature::kCursorImageGT32x32,
          WebFeature::kCursorImageLE32x32,
          WebFeature::kHistoryPushState,
          WebFeature::kHistoryReplaceState,
          WebFeature::kCursorImageGT64x64,
          WebFeature::kAdClick,
          WebFeature::kUpdateWithoutShippingOptionOnShippingAddressChange,
          WebFeature::kUpdateWithoutShippingOptionOnShippingOptionChange,
          WebFeature::kSignedExchangeInnerResponseInMainFrame,
          WebFeature::kSignedExchangeInnerResponseInSubFrame,
          WebFeature::kWebShareShare,
          WebFeature::kHTMLAnchorElementDownloadInSandboxWithUserGesture,
          WebFeature::kHTMLAnchorElementDownloadInSandboxWithoutUserGesture,
          WebFeature::kNavigationDownloadInSandboxWithUserGesture,
          WebFeature::kNavigationDownloadInSandboxWithoutUserGesture,
          WebFeature::kDownloadInAdFrameWithUserGesture,
           WebFeature::kDownloadInAdFrameWithoutUserGesture,
           WebFeature::kOpenWebDatabase,
           WebFeature::kV8MediaCapabilities_DecodingInfo_Method,
          WebFeature::kOpenerNavigationDownloadCrossOriginNoGesture,
       }));
   return *opt_in_features;
 }

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.