Indeed Engineering util ViewExportedVariablesServlet.java appendTo cross site scripting

Successful exploitation of CVE-2020-36634 allows an attacker to execute arbitrary JavaScript code within the context of a user's browser session. This can lead to the theft of sensitive information, such as session cookies, which could be used to impersonate the user. Attackers could also modify the content of the web page, potentially redirecting users to malicious websites or displaying misleading information. The impact is primarily focused on user-facing components of the application, and the blast radius depends on the sensitivity of the data handled by the application.

Organizations using Indeed Engineering util in their applications, particularly those handling sensitive user data, are at risk. Shared hosting environments where multiple applications share the same infrastructure are also at increased risk, as a vulnerability in one application could potentially be exploited to compromise others.

• java / server:

# Check for vulnerable versions of Indeed Engineering util
find / -name "varexport-1.0.x.jar" -print -quit

• generic web:

# Check response headers for potential XSS indicators
curl -I <application_url>

1. 2020-07-16Discovery

   discovery

2. 2022-12-27Disclosure

   disclosure

1. आरक्षित2022-12-27
2. प्रकाशित2022-12-27
3. संशोधित2024-11-19
4. EPSS अद्यतन2026-04-02

The primary mitigation for CVE-2020-36634 is to upgrade Indeed Engineering util to version 1.0.34 or later, which includes the fix (patch c0952a9db51a880e9544d9fac2a2218a6bfc9c63). If an immediate upgrade is not possible, consider implementing input validation and output encoding on user-supplied data to prevent the injection of malicious scripts. Web application firewalls (WAFs) configured to detect and block XSS attacks can also provide a temporary layer of protection. After upgrading, confirm the fix by attempting to inject a simple XSS payload into the vulnerable endpoint and verifying that it is properly sanitized.