CVE-2026-34813: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Endian Endian Firewall
Endian Firewall version 3. 3. 25 and earlier contains a stored cross-site scripting (XSS) vulnerability in the /cgi-bin/proxyuser. cgi endpoint via the user parameter. An attacker with authenticated access can inject malicious JavaScript code that is stored and executed when other users view the affected page. This vulnerability has a medium severity with a CVSS 4. 0 base score of 5. 1. No official patch or remediation information is provided in the available data.
AI Analysis
Technical Summary
CVE-2026-34813 is a stored cross-site scripting vulnerability affecting Endian Firewall version 3.3.25 and prior. The issue arises from improper neutralization of input in the user parameter of the /cgi-bin/proxyuser.cgi CGI script. Authenticated attackers can inject arbitrary JavaScript code that is stored on the server and executed in the browsers of other users who access the affected page. This can lead to client-side script execution in the context of the vulnerable web application.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary JavaScript in the browsers of other users viewing the affected page, potentially leading to session hijacking, unauthorized actions, or information disclosure within the context of the web application. The vulnerability is rated medium severity with a CVSS 4.0 score of 5.1, indicating a moderate risk.
Mitigation Recommendations
No official patch or remediation guidance is provided in the available information. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit authenticated user access to trusted individuals and monitor for suspicious activity related to the affected endpoint.
CVE-2026-34813: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Endian Endian Firewall
Description
Endian Firewall version 3. 3. 25 and earlier contains a stored cross-site scripting (XSS) vulnerability in the /cgi-bin/proxyuser. cgi endpoint via the user parameter. An attacker with authenticated access can inject malicious JavaScript code that is stored and executed when other users view the affected page. This vulnerability has a medium severity with a CVSS 4. 0 base score of 5. 1. No official patch or remediation information is provided in the available data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34813 is a stored cross-site scripting vulnerability affecting Endian Firewall version 3.3.25 and prior. The issue arises from improper neutralization of input in the user parameter of the /cgi-bin/proxyuser.cgi CGI script. Authenticated attackers can inject arbitrary JavaScript code that is stored on the server and executed in the browsers of other users who access the affected page. This can lead to client-side script execution in the context of the vulnerable web application.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary JavaScript in the browsers of other users viewing the affected page, potentially leading to session hijacking, unauthorized actions, or information disclosure within the context of the web application. The vulnerability is rated medium severity with a CVSS 4.0 score of 5.1, indicating a moderate risk.
Mitigation Recommendations
No official patch or remediation guidance is provided in the available information. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit authenticated user access to trusted individuals and monitor for suspicious activity related to the affected endpoint.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-03-30T20:26:18.725Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69ce8673e6bfc5ba1de337d9
Added to database: 4/2/2026, 3:08:35 PM
Last enriched: 4/10/2026, 12:06:48 AM
Last updated: 5/20/2026, 9:41:44 PM
Views: 32
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