CVE-2021-31673

MEDIUM

Cyclos 4.0.0-4.14.7 - DOM-Based Cross-Site Scripting via Registration GroupId Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-31673. PoCs published by Tin Pham.

AI-analyzed exploit summary This is a writeup describing a DOM-based XSS vulnerability in Cyclos 4.14.7 and prior versions. The vulnerability allows remote attackers to inject arbitrary web scripts or HTML via the 'groupId' parameter during user registration.

Description

A Dom-based Cross-site scripting (XSS) vulnerability at registration account in Cyclos 4 PRO.14.7 and before allows remote attackers to inject arbitrary web script or HTML via the groupId parameter.

Exploits (1)

exploitdb WRITEUP
by Tin Pham · textwebappsmultiple
https://www.exploit-db.com/exploits/50909

This is a writeup describing a DOM-based XSS vulnerability in Cyclos 4.14.7 and prior versions. The vulnerability allows remote attackers to inject arbitrary web scripts or HTML via the 'groupId' parameter during user registration.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Cyclos 4.14.7 (and prior)
No auth needed
Prerequisites: Victim must open a crafted URL
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Not Applicable x_refsource_misc
http://cyclos.com
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/167040/Cyclos-4.14.7-Cross-Site-Scripting.html

Scores

CVSS v3 6.1
EPSS 0.0335
EPSS Percentile 87.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
cyclos/cyclos 4.0.0 - 4.14.7
Published May 02, 2022
Tracked Since Feb 18, 2026