CVE-2026-2224 is a cross-site scripting vulnerability identified in the code-projects Online Reviewer System version 1.0. The vulnerability arises from insufficient input validation or sanitization of the 'firstname' parameter within the PHP script located at /system/system/admins/manage/users/btn_functions.php. An attacker can remotely supply crafted input to this parameter, which is then reflected in the web application's output without proper encoding or filtering, enabling the injection and execution of arbitrary JavaScript code in the context of authenticated or unauthenticated users. The attack vector is network-based (remote), requires no authentication, but does require user interaction to trigger the malicious script. The vulnerability impacts the integrity and availability of the affected system by potentially allowing session hijacking, defacement, or redirection to malicious sites. Although the confidentiality impact is minimal, the presence of public exploits increases the likelihood of exploitation. The CVSS 4.0 vector indicates low attack complexity and no privileges required, but user interaction is necessary. No patches or official remediation have been published, leaving organizations reliant on mitigations such as input validation, output encoding, and web application firewalls. The vulnerability is specific to version 1.0 of the Online Reviewer System, which may be used in academic, corporate, or project management environments for reviewing submissions or documents.

The primary impact of CVE-2026-2224 is the potential execution of arbitrary scripts in users' browsers, which can lead to session hijacking, credential theft, unauthorized actions on behalf of users, or redirection to malicious websites. This can undermine user trust and lead to reputational damage for organizations using the affected software. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to exploit it. The lack of authentication requirement broadens the attack surface, allowing any remote attacker to attempt exploitation. Although the confidentiality impact is limited, the integrity and availability of user sessions and application data can be compromised. Organizations relying on the Online Reviewer System for critical review workflows may experience disruption or data manipulation. The public availability of exploits increases the risk of widespread attacks, especially in environments where patching or mitigation is delayed. Overall, the vulnerability poses a moderate risk to organizations, particularly those with exposed instances accessible to external users or clients.

To mitigate CVE-2026-2224, organizations should implement strict input validation and sanitization on the 'firstname' parameter and any other user-supplied inputs within the Online Reviewer System. Employ context-aware output encoding (e.g., HTML entity encoding) to prevent script injection in rendered pages. Deploy a web application firewall (WAF) with rules designed to detect and block XSS payloads targeting the affected endpoint. Conduct thorough code reviews and security testing to identify and remediate similar vulnerabilities in other parts of the application. If possible, isolate the affected system behind VPNs or restrict access to trusted users to reduce exposure. Educate users about the risks of clicking suspicious links or interacting with untrusted content to reduce the likelihood of successful exploitation. Monitor logs for unusual activity indicative of XSS attacks. Since no official patches are available, consider engaging with the vendor for updates or applying custom patches to sanitize inputs. Finally, implement Content Security Policy (CSP) headers to limit the impact of injected scripts.