CVE-2026-6003
Cross-Site Scripting in Simple IT Forum /admin/user.php
Publication date: 2026-04-10
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| code-projects | simple_it_discussion_forum | 1.0 |
Helpful Resources
Exploitability
| 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 Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-6003 is a Cross-Site Scripting (XSS) vulnerability found in version 1.0 of the Simple IT Discussion Forum, specifically in the '/admin/user.php' file.
The vulnerability occurs because the application directly outputs user-supplied input from the 'fname' parameter without proper encoding or filtering.
This lack of input validation allows attackers to inject malicious JavaScript code that executes in the victim's browser.
How can this vulnerability impact me? :
Exploitation of this vulnerability can have severe impacts including:
- Attackers can steal cookies, session tokens, or other sensitive information.
- Perform unauthorized actions on behalf of the victim.
- Deface web pages or redirect users to malicious sites.
- Potentially gain control over the victim's browser.
Notably, exploitation does not require user login or authorization.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by testing the 'fname' parameter in the '/admin/user.php' page for cross-site scripting (XSS) issues. A common method is to inject a proof-of-concept payload such as <script>prompt(/xss/);</script> into the 'fname' parameter and then observe if the script executes when visiting the page.
You can use tools like curl or a web browser to send requests with the malicious payload and check the response for unencoded script execution.
- Example curl command to test injection: curl -G --data-urlencode "fname=<script>prompt(/xss/);</script>" https://your-target-site/admin/user.php
- Alternatively, use a web proxy or browser developer tools to inject and monitor the payload execution.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include:
- Implement proper output encoding for all user inputs, especially the 'fname' parameter, to ensure inputs are treated as text and not executable code.
- Enforce strict input validation and filtering to reject or sanitize malicious content such as script tags or event handlers.
- Deploy a strict Content Security Policy (CSP) to restrict the sources of executable scripts and prevent unauthorized script execution.
- Set HttpOnly and Secure flags on cookies to prevent JavaScript access and ensure cookies are transmitted only over HTTPS.
- Conduct regular security audits and code reviews to detect and remediate XSS and other vulnerabilities promptly.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The Cross-Site Scripting (XSS) vulnerability in Simple IT Discussion Forum 1.0 allows attackers to execute malicious scripts in users' browsers, potentially leading to theft of sensitive information such as cookies and session tokens. This unauthorized access and data exposure can compromise user privacy and data security.
Such a vulnerability can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive data against unauthorized access and breaches. Failure to remediate this vulnerability may result in violations of these regulations due to inadequate security controls and potential data leakage.
Therefore, addressing this vulnerability through proper input validation, output encoding, and other recommended mitigations is critical to maintaining compliance with data protection standards.