Interactsh server settings make users vulnerable to Subdomain Takeover
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| projectdiscovery | interactsh | before 1.0.0 | 1.0.0 | Patch available | CNA |
| — | github.com/projectdiscovery/interactsh (Go) | before 1.0.0 | 1.0.0 | Patch available | GHSA-m36x-mgfh-8g78 |
- interactsh Vendorprojectdiscovery Affected before 1.0.0 Fixed in 1.0.0 Patch available CNA
- github.com/projectdiscovery/interactsh (Go) Vendor— Affected before 1.0.0 Fixed in 1.0.0 Patch available GHSA-m36x-mgfh-8g78
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:projectdiscovery:interactsh:*:*:*:*:*:*:*:* | before 1.0.0 | Vulnerable | projectdiscovery |
- cpe:2.3:a:projectdiscovery:interactsh:*:*:*:*:*:*:*:* Versions before 1.0.0 Vulnerable ·projectdiscovery
Remediation
- Fix · CNA interactsh (projectdiscovery) Fixed in 1.0.0
- Fix · GHSA-m36x-mgfh-8g78 github.com/projectdiscovery/interactsh (Go) Fixed in 1.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-36474
- 2026-10-03 Alias added: GHSA-m36x-mgfh-8g78
References
Advisory 2
More projectdiscovery Interactsh vulnerabilities
- TI-2024-04886 ProjectDiscovery Interactsh - Files or Directories Accessible to External Parties CVSS 4.0CRITICAL 9.3
Sources
- CVE-2023-36474 · CVE Program
- CVE-2023-36474 · NVD
- FIRST EPSS
- GHSA-m36x-mgfh-8g78 · GitHub Advisory Database · CC BY 4.0
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