CVE-2026-108566
Received Received - Intake

Cross-Site Scripting in InstantSoft icms2

Publication date: 2026-10-11

Last updated on: 2026-10-11

Assigner: VulDB

Description
A vulnerability has been found in InstantSoft icms2 up to 2.18.2. This issue affects the function index of the file templates/default/controllers/messages/index.tpl.php of the component Private Message Handler. Such manipulation of the argument nickname leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 3a1ec8fcb073a46d06a2ab83bc2bf68225834281. It is best practice to apply a patch to resolve this issue.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-11
Last Modified
2026-10-11
Generated
2026-10-11
AI Q&A
2026-10-11
EPSS Evaluated
N/A
NVD
CVE-2026-108566
EUVD
EUVD-2026-96869

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
InstantSoft icms2 2.18.0
InstantSoft icms2 2.18.1
InstantSoft icms2 2.18.2

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a cross-site scripting (XSS) issue in InstantSoft icms2 versions up to 2.18.2. It occurs in the Private Message Handler component due to improper handling of the nickname argument in the templates/default/controllers/messages/index.tpl.php file. An attacker can exploit this by manipulating the argument to inject malicious scripts.

Detection Guidance

To detect this XSS vulnerability in InstantSoft icms2, inspect the templates/default/controllers/messages/index.tpl.php file for improper handling of the nickname parameter. Check if user input is properly escaped before rendering. Review server logs for unusual input patterns in the Private Message Handler component.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary scripts in the context of a user's browser session. This could lead to theft of session cookies, account takeover, or defacement of web pages. Users with access to the system could be affected if they view a crafted message.

Compliance Impact

This XSS vulnerability could compromise user data confidentiality, potentially violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. It may lead to unauthorized access to sensitive data, triggering compliance violations and legal consequences.

Mitigation Strategies

Apply the provided patch 3a1ec8fcb073a46d06a2ab83bc2bf68225834281 immediately. Update the templates/default/controllers/messages/index.tpl.php file to escape the nickname variable using the html() function as shown in the patch. Disable the Private Message Handler component if not essential until patched.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-108566. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart