FireBox <= 3.1.15 - Unauthenticated Reflected Cross-Site Scripting via Smart Tags
- ID
- WPSEC-2026-2794
- Plugin
- FireBox – WooCommerce Popup Builder, Exit Intent Popup, Email Optin & Cart Abandonment (firebox)
- Affected
- all versions before 3.1.16
- Remediation
- Update to 3.1.16 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-10
- Attack surface
- FireBox on WPSec AttackSurface
- Fix released
- Published
Description
The FireBox plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the {querystring.*}, {cookie.*}, {post.*} and {client.useragent} Smart Tags in all versions up to, and including, 3.1.15 due to insufficient input sanitization and output escaping. Values sent by a visitor were only stripped of HTML tags without encoding quotes (and the User-Agent value was returned without any sanitization), and Smart Tags are replaced after campaign content has been rendered and escaped, so a value placed inside an HTML attribute could break out of it. This makes it possible for unauthenticated attackers to inject arbitrary web scripts into pages containing a campaign that uses these Smart Tags, which execute if they can successfully trick a user into performing an action such as clicking on a crafted link.
References
- https://wpsec.com/vuln/WPSEC-2026-2794/
- https://plugins.svn.wordpress.org/firebox/tags/3.1.16/
- https://wordpress.org/plugins/firebox/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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