Backdrop CMS 1.23.0 Cross Site Scripting

2024.03.20

Credit: Sinem Sahin

Risk: Low

Local: No

Remote: Yes

CVE: N/A

CWE: CWE-79

# Exploit Title: Backdrop CMS 1.23.0 - Stored Cross-Site Scripting - Post Body Field
# Date: 2023-08-21
# Exploit Author: Sinem Şahin
# Vendor Homepage: https://backdropcms.org/
# Version: 1.23.0
# Tested on: Windows & XAMPP

==> Tutorial <==

1- Go to the following url. => http://(HOST)/backdrop/node/add/post
2- Write your xss payload in the body of the post. Formatting options should be RAW HTML to choose from.
3- Press "Save" button.

XSS Payload ==> "<script>alert("post_body")</script>

See this note in RAW Version

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{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1

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Backdrop CMS 1.23.0 Cross Site Scripting

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