> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/web/xss/xss-in-a-javascript-string-with-apostrophe-and-backslash-escaped.md).
# XSS in a JavaScript String with Apostrophe and Backslash Escaped
XSS in a JavaScript String with Apostrophe and Backslash Escaped notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, and remediati
### Reflected XSS Into a JavaScript String with Single Quote and Backslash Escaped
Reflected XSS in the search terms tracking feature. The value reflected is inserted into a JavaScript string; Simple apostrophes and backslashes have escaped, making escape difficult.
Objective
* Get out of the escaped JavaScript string and call `alert()`.
Observations actuelles
* If `testing` is sent, the value is stored in the `searchTerm` variable of the script.
* Attempt to introduce a new variable:/ `testing'; var=test='thisIsATest`/ → It is observed that quotation marks and antislashes () are injected/present and prevent direct injection.
```bash
testing'; var=test='thisIsATest
```
* Simply inserting the script closure tag can close the script context: ``
```javascript
```
* After closing, simple HTML text can be rendered: `
HACK
`
```javascript
HACK
```
* And finally, it is possible to run a `alert` by adding a new ``
```javascript
```
---
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