elinicksic Razgover Chat Message send.php cross site scripting

The primary impact of CVE-2019-25262 is the potential for cross-site scripting (XSS) attacks. An attacker could inject malicious JavaScript code into the 'msg' argument of the Chattify/send.php endpoint. When a user views the affected page, the injected script executes in their browser context, allowing the attacker to steal cookies, redirect the user to a malicious website, or deface the application. The remote nature of the vulnerability means an attacker doesn't need to be authenticated to exploit it, significantly broadening the attack surface. This vulnerability shares similarities with other XSS flaws, where user-supplied input is not properly sanitized before being rendered in a web page, potentially leading to account takeover or data exfiltration.

Organizations utilizing Razgover, particularly those relying on its Chat Message Handler component for internal communication or customer support, are at risk. Systems with older, unpatched versions of Razgover (prior to 37.0.1) are particularly vulnerable. Shared hosting environments where multiple users share the same Razgover instance are also at increased risk, as an attacker could potentially compromise other users through this vulnerability.

• php: Examine access logs for requests to Chattify/send.php with unusual or suspicious characters in the 'msg' parameter. Use grep to search for patterns like <script or onerror=.

grep '<script' /var/log/apache2/access.log | grep 'Chattify/send.php'

1. 2025-12-31Disclosure

   disclosure

1. Reservado2025-12-29
2. Publicada2025-12-31
3. Modificada2026-01-02
4. EPSS atualizado2026-03-23

The primary mitigation for CVE-2019-25262 is to apply the provided patch (995dd89d0e3ec5522966724be23a5d58ca1bdac3) and upgrade Razgover to version 37.0.1. Given Razgover's rolling release system, immediate patching is crucial. If upgrading is not immediately feasible, consider implementing a Web Application Firewall (WAF) rule to filter requests containing suspicious characters or patterns in the 'msg' parameter. Input validation on the server-side, specifically sanitizing user-supplied data before rendering it in the web page, is a crucial long-term security practice. After upgrade, confirm the vulnerability is resolved by attempting to inject a simple XSS payload (e.g., <script>alert(1)</script>) into the 'msg' parameter and verifying that it does not execute.