CVE-2025-11124: Project Monitoring System XSS Vulnerability

CVE-2025-11124 Overview

CVE-2025-11124 is a reflected cross-site scripting (XSS) vulnerability in code-projects Project Monitoring System 1.0. The flaw resides in the /onlineJobSearchEngine/postjob.php endpoint, where the txtapplyto request parameter is rendered without sufficient output encoding. An authenticated remote attacker can inject arbitrary HTML or JavaScript that executes in a victim's browser session when the victim interacts with a crafted link or form submission. The vulnerability is tracked under CWE-79 and has been publicly disclosed with proof-of-concept details. Other parameters in the same component may be affected.

Critical Impact
Successful exploitation enables session theft, UI redress, phishing content injection, and client-side actions performed in the context of the targeted user.

Affected Products

Fabian / code-projects Project Monitoring System 1.0
Component: /onlineJobSearchEngine/postjob.php
Parameter: txtapplyto (additional parameters may be impacted)

Discovery Timeline

2025-09-28 - CVE-2025-11124 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-11124

Vulnerability Analysis

The vulnerability exists in the job posting workflow of the Project Monitoring System's online job search engine module. The postjob.php script accepts user-controlled input through the txtapplyto parameter and reflects it back into the generated HTML response without applying context-aware output encoding or input sanitization. When a victim submits or loads a URL containing attacker-crafted payload values, the browser parses the injected markup and executes any embedded script. Because the issue is a reflected XSS, successful exploitation typically requires user interaction such as clicking a prepared link. The attack can be initiated over the network and requires low privileges.

Root Cause

The root cause is improper neutralization of input during web page generation ([CWE-79]). The postjob.php handler trusts the txtapplyto value and does not apply HTML entity encoding, attribute escaping, or an allow-list validation routine before writing the value into the response body. The pattern is consistent across potentially multiple parameters in the same file, suggesting a lack of a centralized output-encoding layer in the application framework.

Attack Vector

An attacker crafts a URL or HTML form targeting /onlineJobSearchEngine/postjob.php with a malicious JavaScript payload in the txtapplyto parameter. The attacker then delivers the link to an authenticated user through phishing, instant messaging, or a malicious site. When the victim loads the request, the server returns a page that executes the attacker's script in the browser's security context for the vulnerable application. The script can read cookies not protected by HttpOnly, read DOM contents, modify the page, submit requests on behalf of the user, or stage credential-harvesting dialogs.

No verified exploit code is available in the NVD record. Public documentation of the issue is maintained in the GitHub CVE Proof of Concept and the VulDB #326205 Details entry.

Detection Methods for CVE-2025-11124

Indicators of Compromise

HTTP requests to /onlineJobSearchEngine/postjob.php containing script tags, event handlers (onerror=, onload=), or JavaScript URI schemes in the txtapplyto parameter.
Reflected responses from postjob.php that include unescaped <, >, or quote characters originating from request parameters.
Unexpected outbound requests from user browsers to attacker-controlled domains shortly after accessing the job posting page.

Detection Strategies

Deploy web application firewall (WAF) rules that inspect request parameters for XSS payload patterns targeting the vulnerable endpoint.
Enable application-level request logging and correlate parameter values with response bodies to identify reflection points.
Hunt in proxy and endpoint telemetry for user agents retrieving postjob.php with encoded script keywords such as %3Cscript%3E or javascript:.

Monitoring Recommendations

Monitor browser error telemetry and Content Security Policy (CSP) violation reports originating from the application host.
Alert on sudden spikes of 200-status responses to postjob.php with abnormally long query strings.
Review authentication logs for session anomalies that follow access to the vulnerable endpoint, which may indicate session hijacking attempts.

How to Mitigate CVE-2025-11124

Immediate Actions Required

Restrict external access to /onlineJobSearchEngine/postjob.php until a patched build is deployed.
Apply WAF signatures to block requests containing XSS payloads in the txtapplyto parameter and any related form fields.
Enforce a strict Content Security Policy that disallows inline script execution to reduce reflected XSS impact.
Mark session cookies as HttpOnly, Secure, and SameSite=Strict to limit theft via injected scripts.

Patch Information

At the time of publication, no vendor patch is listed in the NVD advisory for Project Monitoring System 1.0. Administrators should monitor the code-projects security resources page for updates and apply fixes promptly when released. In the interim, remediate by patching the source: HTML-encode the txtapplyto value and all other reflected parameters in postjob.php using the server-side templating engine's built-in escaping functions.

Workarounds

Implement server-side input validation that rejects characters outside the expected set for the txtapplyto field.
Apply context-aware output encoding across all parameters rendered by postjob.php and audit sibling endpoints in the onlineJobSearchEngine module.
Deploy a reverse-proxy filter that strips or encodes HTML metacharacters in query parameters sent to the vulnerable path.
Consider taking the application offline if it is deployed in a production environment with sensitive user data, since the vendor is community-maintained and patch timelines are not guaranteed.

bash

# Example Nginx reverse-proxy rule to block script-like payloads to postjob.php
location /onlineJobSearchEngine/postjob.php {
    if ($args ~* "(<script|javascript:|onerror=|onload=|%3Cscript)") {
        return 403;
    }
    proxy_pass http://backend;
}