An XSS vulnerability affects the OAuth web services used by the WebVue, WebScheduler, TouchVue and SnapVue features of PcVue in version 12.0.0 through 16.3.3 included. It might allow a remote attacker to trick a legitimate user into loading content from another site upon unsuccessful user authentication on an unknown application (unknown client_id).

This vulnerability only affects the error page of the OAuth server.
Advisories

No advisories yet.

Fixes

Solution

Harden the configuration Who should apply this recommendation: All users To reduce the risk of exploitation, ARC Informatique strongly recommends implementing the following defensive measures: * Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from insecure networks. * Locate control system networks and remote devices behind firewalls and isolate them from business networks. * When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. Uninstall the Web Server Who should apply this recommendation: All users not using the affected component If your system does not require the use of the Web & Mobile features, you should make sure not to install them. If your system requires the use of the Web & Mobile features, they should be installed only on the Web Server. See the product help related to the installation for more information. Update the Web Deployment Console (WDC) and re deploy the Web Server Who should apply this recommendation: All users running affected components. Install a patched release of the Web Deployment Console (WDC) on the IIS Web server and use it to re-deploy the Web Site. Some settings might need to be updated if third-party web apps or services depend on the OAuth ROPC flow. In a patched release of the WDC, new settings are available for each authorized Client to enable or disable: * The Authorization Code flow * The Authorization Code flow with PKCE * The Resource Owner Password Credentials (ROPC) flow By default, all the OAuth flows are now disabled for third-party web apps and need to be manually enabled before deployment if required. To verify that the patch is applied correctly, you must check that: * The File version property of the file ./bin/Modules/WebDeployment/WebDeploymentConsole.exe matches the deployed release or later, and ensure that any earlier release is no longer used; * Web Sites have been redeployed; * OAuth flow are correctly set for each authorized Client. Available patches: Patch provided in: * PcVue 16.3.4 (16.3.4902.3112) Patch planned in: * PcVue 15.2.14


Workaround

No workaround given by the vendor.

References
History

Thu, 26 Feb 2026 08:15:00 +0000

Type Values Removed Values Added
Description An XSS vulnerability affects the OAuth web services used by the WebVue, WebScheduler, TouchVue and SnapVue features of PcVue in version 12.0.0 through 16.3.3 included. It might allow a remote attacker to trick a legitimate user into loading content from another site upon unsuccessful user authentication on an unknown application (unknown client_id). This vulnerability only affects the error page of the OAuth server.
Title XSS vulnerability upon unsuccessful authentication
First Time appeared Arcinfo
Arcinfo pcvue
Weaknesses CWE-79
CPEs cpe:2.3:a:arcinfo:pcvue:*:*:*:*:*:*:*:*
cpe:2.3:a:arcinfo:pcvue:12.0.0:*:*:*:*:*:*:*
Vendors & Products Arcinfo
Arcinfo pcvue
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:N/AU:Y/R:U/RE:M/U:Clear'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: arcinfo

Published:

Updated: 2026-02-26T07:57:11.931Z

Reserved: 2026-01-30T08:38:05.262Z

Link: CVE-2026-1695

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-02-26T08:16:19.063

Modified: 2026-02-26T08:16:19.063

Link: CVE-2026-1695

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses