CVE-2026-34800
Stored XSS in Endian Firewall uplinkeditor.cgi Allows Script Injection
Publication date: 2026-04-02
Last updated on: 2026-04-07
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| endian | firewall_community | to 3.3.25 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
The immediate mitigation step is to update Endian Firewall to a version later than 3.3.25 where this vulnerability is fixed.
Can you explain this vulnerability to me?
CVE-2026-34800 is a stored cross-site scripting (XSS) vulnerability in Endian Firewall versions 3.3.25 and earlier. It occurs because the NAME parameter in the /cgi-bin/uplinkeditor.cgi endpoint does not properly neutralize input, allowing an authenticated attacker to inject arbitrary JavaScript code.
This malicious script is stored on the server and executed when other users view the affected page, potentially compromising their security.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not specify how the stored cross-site scripting (XSS) vulnerability in Endian Firewall versions 3.3.25 and prior impacts compliance with common standards and regulations such as GDPR or HIPAA.
How can this vulnerability impact me? :
This vulnerability allows an authenticated attacker to inject and store malicious JavaScript code that executes in the browsers of other users who visit the affected page.
- It can lead to theft of user credentials or session tokens.
- It may enable attackers to perform actions on behalf of other users.
- It can result in unauthorized access to sensitive information.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by checking for the presence of malicious JavaScript code injected via the NAME parameter to the /cgi-bin/uplinkeditor.cgi endpoint on Endian Firewall versions 3.3.25 and prior.
Since the vulnerability requires authentication, detection involves authenticated access to the affected endpoint and inspecting the stored NAME parameter values for suspicious or arbitrary JavaScript code.
No specific detection commands are provided in the available resources.