The Waitlist Woocommerce ( Back in stock notifier ) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'type' Shortcode Attribute in all versions up to, and including, 2.9.1 due to insufficient input sanitization and output escaping. 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. The wp_kses_post filter applied on contributor post save does not prevent this vulnerability because shortcode attribute values are not HTML and pass through kses unchanged; the payload is materialized only at render time when the shortcode is expanded.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00193.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
xootix Waitlist Woocommerce ( Back in stock notifier ) unaffected
Version Status Constraints
0 affected ≤ 2.9.1

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://plugins.trac.wordpress.org/browser/waitlist-woocommerce/tags/2.9.0/includes/xoo-wl-functions.php#L114 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/waitlist-woocommerce/tags/2.9.0/includes/xoo-wl-functions.php#L155 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/waitlist-woocommerce/tags/2.9.0/includes/xoo-wl-functions.php#L170 cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset/3765571/waitlist-woocommerce/trunk/includes/xoo-wl-functions.php cve-icon cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/41348b65-97d7-467f-801f-a168eb366bba?source=cve cve-icon cve-icon
History

Thu, 29 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 28 Oct 2026 07:00:00 +0000

Type Values Removed Values Added
Description The Waitlist Woocommerce ( Back in stock notifier ) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'type' Shortcode Attribute in all versions up to, and including, 2.9.1 due to insufficient input sanitization and output escaping. 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. The wp_kses_post filter applied on contributor post save does not prevent this vulnerability because shortcode attribute values are not HTML and pass through kses unchanged; the payload is materialized only at render time when the shortcode is expanded.
Title Waitlist Woocommerce ( Back in stock notifier ) <= 2.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'type' Shortcode Attribute
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-10-29T01:41:53.282Z

Reserved: 2026-08-20T16:37:56.464Z

Link: CVE-2026-77188

cve-icon Vulnrichment

Updated: 2026-10-29T01:39:44.443Z

cve-icon NVD

Status : Deferred

Published: 2026-10-28T07:16:49.223

Modified: 2026-10-29T02:16:53.677

Link: CVE-2026-77188

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T10:15:03Z

Weaknesses