# [HIGH] 84% of all websites are impacted by jQuery XSS vulnerabilities

**Source:** Snyk
**Published:** 2019-10-30
**Article:** https://snyk.io/blog/84-percent-of-all-websites-impacted-by-jquery-xss-vulnerabilities/

## Threat Profile

Snyk Blog In this article
Written by Liran Tal 
October 30, 2019
0 mins read Welcome to Snyk's State of JavaScript frameworks security report 2019. In this blog post we'll review security vulnerabilities found in other frontend ecosystem projects.
After reviewing Angular and React as major JavaScript frameworks, we’ll take a brief review of selected JavaScript and CSS frameworks: Vue.js, jQuery and Bootstrap.
Download the Report here !
jQuery security jQuery took web development by storm a decad…

## Indicators of Compromise (high-fidelity only)

- _No high-fidelity IOCs in the RSS summary._ If the source publishes a technical write-up with defanged IOCs in the body, those would be picked up automatically on the next pipeline run.

## MITRE ATT&CK Techniques

- **T1204.002** — User Execution: Malicious File

## Kill chain phases observed

_(none detected from narrative keywords)_

## Recommended hunts

### Article-specific behavioural hunt — 84% of all websites are impacted by jQuery XSS vulnerabilities

`UC_3159_0` · phase: **exploit** · confidence: **High**

**Splunk SPL (CIM):**
```spl
``` Article-specific bespoke detection — 84% of all websites are impacted by jQuery XSS vulnerabilities ```
| tstats `summariesonly` count earliest(_time) AS firstTime latest(_time) AS lastTime
    from datamodel=Endpoint.Processes
    where (Processes.process_name IN ("vue.js","jquery.js"))
    by Processes.dest, Processes.user, Processes.process_name,
       Processes.process, Processes.parent_process_name, Processes.process_path
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| append [
| tstats `summariesonly` count
    from datamodel=Endpoint.Filesystem
    where Filesystem.action IN ("created","modified")
      AND (Filesystem.file_name IN ("vue.js","jquery.js"))
    by Filesystem.dest, Filesystem.user, Filesystem.process_name,
       Filesystem.file_path, Filesystem.file_name
| `drop_dm_object_name(Filesystem)`
]
```

**Defender KQL:**
```kql
// Article-specific bespoke detection — 84% of all websites are impacted by jQuery XSS vulnerabilities
// Hunts the actual binaries / paths / commandline fragments named
// in the article instead of a generic technique-class template.
DeviceProcessEvents
| where Timestamp > ago(30d)
| where (FileName in~ ("vue.js", "jquery.js"))
| project Timestamp, DeviceName, AccountName, FileName,
          FolderPath, ProcessCommandLine,
          InitiatingProcessFileName, InitiatingProcessCommandLine
| order by Timestamp desc

// File-creation events for the named binaries / paths
DeviceFileEvents
| where Timestamp > ago(30d)
| where ActionType in ("FileCreated","FileModified")
| where (FileName in~ ("vue.js", "jquery.js"))
| project Timestamp, DeviceName, AccountName, FolderPath,
          FileName, ActionType, InitiatingProcessFileName,
          InitiatingProcessCommandLine
| order by Timestamp desc
```


## Why this matters

Severity classified as **HIGH** based on: 1 use case(s) fired, 1 technique(s) inferred. Read the full article for actor attribution, tooling details, and any defanged IOCs in the body that aren't visible in the RSS summary.