Plateforme
php
Composant
submit
Corrigé dans
1.0.1
CVE-2026-4877 describes a cross-site scripting (XSS) vulnerability affecting itsourcecode Payroll Management System versions up to 1.0. This flaw allows attackers to inject malicious scripts by manipulating the 'page' argument within the /index.php file. Successful exploitation could lead to session hijacking, data theft, or website defacement. A public proof-of-concept exists, increasing the risk of immediate exploitation.
The primary impact of CVE-2026-4877 is the ability for an attacker to execute arbitrary JavaScript code within the context of a user's browser session on the Payroll Management System. This can be leveraged to steal session cookies, allowing the attacker to impersonate legitimate users and gain unauthorized access to sensitive payroll data. Furthermore, the attacker could modify the appearance of the website, redirect users to malicious sites, or inject malware. The blast radius extends to any user accessing the vulnerable Payroll Management System, particularly those with administrative privileges, as they would have access to more sensitive data and functionalities.
CVE-2026-4877 has a public proof-of-concept available, indicating a relatively high probability of exploitation. The vulnerability was disclosed on 2026-03-26. While no active campaigns have been publicly confirmed, the availability of a PoC significantly increases the risk of opportunistic attacks. Monitor security advisories from itsourcecode for updates and patches.
Organizations utilizing itsourcecode Payroll Management System version 1.0, particularly those with limited security resources or those who haven't implemented robust input validation practices, are at significant risk. Shared hosting environments where multiple clients share the same server infrastructure are also at increased risk, as a compromise of one client's instance could potentially impact others.
• php / web:
curl -I 'http://your-payroll-system.com/index.php?page=<script>alert(1)</script>' | grep -i content-type• generic web:
grep -i "<script>" /var/log/apache2/access.log• generic web:
grep -i "<script>" /var/log/apache2/error.logdisclosure
Statut de l'Exploit
EPSS
0.03% (percentile 10%)
CISA SSVC
Vecteur CVSS
The primary mitigation for CVE-2026-4877 is to upgrade to a patched version of itsourcecode Payroll Management System as soon as it becomes available. In the absence of a patch, implement temporary mitigations such as deploying a Web Application Firewall (WAF) with rules to filter out malicious script injections targeting the 'page' parameter in /index.php. Strict input validation on the 'page' parameter, ensuring it only accepts expected values, can also help prevent exploitation. Regularly review and update input validation routines to address potential bypasses. Consider implementing Content Security Policy (CSP) to restrict the sources from which scripts can be executed.
Mettre à jour vers une version corrigée du système de gestion de la paie. Si aucune version corrigée n'est disponible, il est recommandé d'appliquer des mesures de sécurité telles que la validation et l'assainissement des entrées utilisateur pour prévenir les attaques XSS (Cross-Site Scripting).
Analyses de vulnérabilités et alertes critiques directement dans votre boîte mail.
CVE-2026-4877 is a cross-site scripting (XSS) vulnerability in itsourcecode Payroll Management System versions up to 1.0, allowing attackers to inject malicious scripts via the 'page' parameter in /index.php.
If you are using itsourcecode Payroll Management System version 1.0, you are potentially affected by this vulnerability. Upgrade as soon as a patch is available.
The recommended fix is to upgrade to a patched version of itsourcecode Payroll Management System. Until then, implement WAF rules and input validation.
While no active campaigns have been confirmed, a public proof-of-concept exists, increasing the likelihood of exploitation.
Please refer to itsourcecode's official website or security advisory channels for the latest information and updates regarding CVE-2026-4877.
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