Endian Firewall 3.3.25 Parameter /cgi-bin/proxypolicy.cgi mimetypes cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Endian Firewall 3.3.25 and classified as problematic. This vulnerability affects unknown code of the file /cgi-bin/proxypolicy.cgi of the component Parameter Handler. The manipulation of the argument mimetypes results in cross site scripting. This vulnerability was named CVE-2026-34812. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Endian Firewall 3.3.25. Affected is an unknown code of the file /cgi-bin/proxypolicy.cgi of the component Parameter Handler. The manipulation of the argument mimetypes with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting (XSS) via the mimetypes parameter to /cgi-bin/proxypolicy.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page.

The weakness was presented by Alex Williams. The advisory is available at help.endian.com. This vulnerability is traded as CVE-2026-34812 since 03/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/30/2026 CVE reserved
04/02/2026 +3 days Advisory disclosed
04/02/2026 +0 days VulDB entry created
04/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: help.endian.com
Researcher: Alex Williams
Status: Confirmed

CVE: CVE-2026-34812 (🔒)
GCVE (CVE): GCVE-0-2026-34812
GCVE (VulDB): GCVE-100-354918

Entryinfo

Created: 04/02/2026 17:32
Changes: 04/02/2026 17:32 (78)
Complete: 🔍
Cache ID: 216::103

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