Cloudron 6.2 Cross Site Scripting

2021.09.18

Credit: Akiner Kisa

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2021-31721

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: Cloudron 6.2 - Cross Site Scripting (Reflected)
# Google Dork: N/A
# Date: 10.06.2021
# Exploit Author: Akıner Kısa
# Vendor Homepage: https://cloudron.io
# Software Link: https://www.cloudron.io/get.html
# Version: 6.3 >
# Tested on: Demo / Localhost
# CVE : CVE-2021-31721
Proof of Concept:
1. Go to https://my.demo.cloudron.io/login.html?returnTo=
2. Type your payload after returnTo=
3. Fill in the login information and press the sign in button.

See this note in RAW Version

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Cloudron 6.2 Cross Site Scripting

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