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Vulnerability record · CVE-2026-61875 · published 12 July 2026

CVE-2026-61875: Cross-site scripting vulnerability

luci-app-upnp contains a stored cross-site scripting vulnerability that allows unauthenticated LAN clients to inject JavaScript via UPnP IGD AddPortMapping SOAP requests. Attackers can send malicious HTML in the NewPortMappingDescription field, which miniupnpd stores and luci-app-upnp renders without output encoding, executing the payload when administrators view the UPnP or Status pages.

8.7 CVSS 4.0 High EPSS 0.55% · top 56.2% CWE-79 · Cross-site scripting Deferred
8.7CVSS 4.0 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
13 Jul 2026Last modified by NVD

Description

luci-app-upnp contains a stored cross-site scripting vulnerability that allows unauthenticated LAN clients to inject JavaScript via UPnP IGD AddPortMapping SOAP requests. Attackers can send malicious HTML in the NewPortMappingDescription field, which miniupnpd stores and luci-app-upnp renders without output encoding, executing the payload when administrators view the UPnP or Status pages.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/openwrt/luci/security/advisories/GHSA-8v49-6387-7f89
https://www.vulncheck.com/advisories/luci-app-upnp-stored-xss-via-upnp-port-mapping-description
https://github.com/openwrt/luci/security/advisories/GHSA-8v49-6387-7f89

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Source: NIST National Vulnerability Database (record CVE-2026-61875), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.