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Web Application Firewall:DescribeUserEventTrend

Last Updated:Jan 12, 2026

Describes the trend of API security attacks.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

yundun-waf:DescribeUserEventTrend

get

*All Resource

*

  • acs:ResourceGroupId
None

Request parameters

Parameter

Type

Required

Description

Example

InstanceId

string

Yes

The ID of the WAF instance.

Note

Call the DescribeInstance operation to query the ID of the WAF instance.

waf-cn-7mz2797x***

ClusterId

string

No

The ID of the hybrid cloud cluster.

Note

This parameter is available only in hybrid cloud scenarios. Call the DescribeHybridCloudClusters operation to obtain information about hybrid cloud clusters.

428

RegionId

string

No

The region of the WAF instance. Valid values:

  • cn-hangzhou: the Chinese mainland.

  • ap-southeast-1: outside the Chinese mainland.

cn-hangzhou

ResourceManagerResourceGroupId

string

No

The ID of the Alibaba Cloud resource group.

rg-aekzwwk****cv5i

EventScope

string

No

The dimension of the security event. Valid values:

  • ip (default): IP security events.

  • account: account security events.

ip

Response elements

Element

Type

Description

Example

object

The request result.

RequestId

string

The request ID.

F51E6DD6-B2D2-57C9-90F1-FAFD0A19DE00

Trend

array<object>

The list of attack trends.

object

The attack details.

EventHigh

integer

The number of important events.

9

EventLow

integer

The number of low-risk events.

23

EventMedium

integer

The number of medium-risk events.

17

Timestamp

integer

The time of the statistics. This is a UNIX timestamp in UTC. Unit: seconds.

1723435200

TimeStamp deprecated

integer

The time of the statistics. This is a UNIX timestamp in UTC. Unit: seconds.

1723435200

Examples

Success response

JSON format

{
  "RequestId": "F51E6DD6-B2D2-57C9-90F1-FAFD0A19DE00",
  "Trend": [
    {
      "EventHigh": 9,
      "EventLow": 23,
      "EventMedium": 17,
      "Timestamp": 1723435200,
      "TimeStamp": 1723435200
    }
  ]
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.