soerennb eXtplorer cross site scripting

Successful exploitation of CVE-2019-25096 allows an attacker to execute arbitrary JavaScript code within the context of a user's browser session. This can lead to a variety of malicious actions, including stealing session cookies, redirecting users to phishing sites, or injecting malicious content into the eXtplorer interface. The impact is particularly severe if eXtplorer is used to manage sensitive files or if it is integrated with other applications. An attacker could potentially gain unauthorized access to files and directories, modify data, or even compromise the entire server if the application is running with elevated privileges.

Organizations and individuals using eXtplorer versions 2.1.0 through 2.1.12 are at risk, particularly those who rely on eXtplorer to manage sensitive files or integrate it with other applications. Shared hosting environments where eXtplorer is installed are also at increased risk, as a compromise of one user's installation could potentially affect other users on the same server.

• php: Examine eXtplorer configuration files for any unusual or unexpected code.

grep -r 'alert(' /path/to/extplorer

• generic web: Monitor access logs for suspicious requests containing JavaScript code or unusual characters in input fields.

grep -i 'script' /var/log/apache2/access.log

• generic web: Check response headers for signs of XSS injection, such as the presence of unexpected JavaScript code in the HTML content.

1. 2019-06-18Discovery

   discovery

2. 2023-01-05Disclosure

   disclosure

3. 2023-01-05Patch

   patch

1. Reserviert2023-01-05
2. Veröffentlicht2023-01-05
3. Geändert2024-08-05
4. EPSS aktualisiert2026-04-02

The primary mitigation for CVE-2019-25096 is to upgrade eXtplorer to version 2.1.13 or later, which includes the necessary patch. If upgrading is not immediately feasible, consider implementing input validation and output encoding measures to sanitize user-supplied data. Web application firewalls (WAFs) can also be configured to detect and block XSS attacks. Review eXtplorer's configuration to ensure that file access permissions are properly restricted and that unnecessary features are disabled. After upgrading, confirm the fix by attempting to inject a simple XSS payload (e.g., <script>alert(1)</script>) through an input field and verifying that it is properly sanitized or blocked.