Advantech WebAccess/VPN up to 1.1.4 cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Advantech WebAccess and VPN up to 1.1.4. This issue affects the function StandaloneVpnClientsController.addStandaloneVpnClientAction. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2025-34237. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Advantech WebAccess and VPN up to 1.1.4. This issue affects the function StandaloneVpnClientsController.addStandaloneVpnClientAction. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

Advantech WebAccess/VPN versions prior to 1.1.5 contain a stored cross-site scripting (XSS) vulnerability via StandaloneVpnClientsController.addStandaloneVpnClientAction(). Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

The weakness was published by Alex Williams. The advisory is shared at icr.advantech.com. The identification of this vulnerability is CVE-2025-34237 since 04/15/2025. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 1.1.5 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

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: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: WebAccess/VPN 1.1.5

Timelineinfo

04/15/2025 CVE reserved
11/06/2025 +205 days Advisory disclosed
11/06/2025 +0 days VulDB entry created
11/28/2025 +22 days VulDB entry last update

Sourcesinfo

Vendor: advantech.com

Advisory: icr.advantech.com
Researcher: Alex Williams
Status: Confirmed

CVE: CVE-2025-34237 (🔒)
GCVE (CVE): GCVE-0-2025-34237
GCVE (VulDB): GCVE-100-331445

Entryinfo

Created: 11/06/2025 21:57
Updated: 11/28/2025 19:39
Changes: 11/06/2025 21:57 (69), 11/28/2025 19:39 (11)
Complete: 🔍
Cache ID: 216::103

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