LightCMS 1.3.4 Cross Site Scripting

2021.02.27
Credit: Peithon
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 3.5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 6.8/10
Exploit range: Remote
Attack complexity: Medium
Authentication: Single time
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

# Exploit Title: LightCMS 1.3.4 - 'exclusive' Stored XSS # Date: 25/02/2021 # Exploit Author: Peithon # Vendor Homepage: https://github.com/eddy8/LightCMS # Software Link: https://github.com/eddy8/LightCMS/releases/tag/v1.3.4 # Version: 1.3.4 # Tested on: latest version of Chrome, Firefox on Windows and Linux # CVE: CVE-2021-3355 An issue was discovered in LightCMS v1.3.4.(https://github.com/eddy8/LightCMS/issues/18) There is a stored-self XSS, allowing an attacker to execute HTML or JavaScript code in a vulnerable Title field to /admin/SensitiveWords. --------------------------Proof of Concept----------------------- 1. Log in to the background. 2. Navigate to System -> `/admin/SensitiveWords/create` & add the below-shared payload as the exclusive field value. Payload - </span><img src=1 onerror=alert(1) /><span> 3. Visit page `/admin/SensitiveWords`, the payload will be triggered.


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