Platform
php
Component
simple-it-discussion-forum
Fixed in
1.0.1
A cross-site scripting (XSS) vulnerability has been identified in Simple IT Discussion Forum versions 1.0.0 through 1.0. This flaw stems from insufficient sanitization of the 'fname' parameter within the /admin/user.php file, allowing attackers to inject malicious scripts. Successful exploitation could lead to session hijacking or defacement of the forum. A patch is available to address this issue.
The primary impact of CVE-2026-6003 is the potential for cross-site scripting (XSS) attacks. An attacker could craft a malicious URL or inject script into a user profile field that, when viewed by another user, executes arbitrary JavaScript code within their browser context. This could allow the attacker to steal session cookies, redirect users to phishing sites, or modify the content of the forum. The attack's success depends on the attacker's ability to control the 'fname' parameter and the victim's interaction with the crafted payload. Given the forum's likely use for internal communication or community discussions, a successful XSS attack could compromise sensitive information or disrupt operations.
This vulnerability has been publicly disclosed, increasing the likelihood of exploitation. While the CVSS score is LOW (2.4), the ease of exploitation and potential impact on user data warrant prompt attention. No known active campaigns or KEV listing are currently associated with this CVE. Public proof-of-concept code may be available, facilitating exploitation by less sophisticated attackers.
Exploit Status
EPSS
0.03% (9% percentile)
CISA SSVC
CVSS Vector
The recommended mitigation for CVE-2026-6003 is to immediately upgrade to a patched version of Simple IT Discussion Forum. Since a specific fixed version is not provided, review the vendor's advisory (if available) for the latest release. As a temporary workaround, implement strict input validation and output encoding on the 'fname' parameter within the /admin/user.php file. Consider using a Web Application Firewall (WAF) with XSS filtering rules to block malicious requests. Regularly scan the forum for XSS vulnerabilities using automated tools.
Update the Simple IT Discussion Forum plugin to the latest available version to mitigate the Cross-Site Scripting (XSS) vulnerability. Check the official plugin source for update instructions and security patches. Implement input validation and escaping measures to prevent future XSS attacks.
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CVE-2026-6003 is a cross-site scripting (XSS) vulnerability affecting Simple IT Discussion Forum versions 1.0.0–1.0, allowing attackers to inject malicious scripts via the 'fname' parameter in /admin/user.php.
You are affected if you are using Simple IT Discussion Forum versions 1.0.0–1.0 and have not upgraded to a patched version. Review the vendor's advisory for the latest release.
Upgrade to the latest patched version of Simple IT Discussion Forum. As a temporary workaround, implement input validation and output encoding on the 'fname' parameter.
While no active campaigns are confirmed, the vulnerability has been publicly disclosed, increasing the risk of exploitation.
Check the Simple IT Discussion Forum website or relevant security mailing lists for the official advisory regarding CVE-2026-6003.
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