Medium severity5.4NVD Advisory· Published Nov 6, 2025· Updated Jun 17, 2026

CVE-2025-34237

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Advantech/Webaccesscpe-rescue2 versions
0+ 1 more
- (no CPE)range: 0
- (no CPE)range: <1.1.5
Advantech/Webaccess\/vpn
cpe:2.3:a:advantech:webaccess\/vpn:*:*:*:*:*:*:*:*
Range: <1.1.5

Patches

Vulnerability mechanics

References

www.vulncheck.com/advisories/advantech-webaccess-vpn-stored-xss-via-standalonevpnclientscontrollernvdThird Party Advisory
icr.advantech.com/download/softwarenvdProduct
icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdfnvdRelease Notes

News mentions

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cvss	0.351
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000