CVE-2026-77188 json
Waitlist Woocommerce ( Back in stock notifier ) <= 2.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'type' Shortcode Attribute
published 2026-10-28 12 d ago modified 2026-10-29 11 d ago also EUVD-2026-111749
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 d ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- xootix Waitlist Woocommerce ( Back in stock notifier )
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/41348b65-97d7-467f-801f-a168eb366bba?source=cve
- plugins.trac.wordpress.org /browser/waitlist-woocommerce/tags/2.9.0/includes/xoo-wl-functions.php#L114
- plugins.trac.wordpress.org /browser/waitlist-woocommerce/tags/2.9.0/includes/xoo-wl-functions.php#L155
- plugins.trac.wordpress.org /browser/waitlist-woocommerce/tags/2.9.0/includes/xoo-wl-functions.php#L170
- plugins.trac.wordpress.org /changeset/3765571/waitlist-woocommerce/trunk/includes/xoo-wl-functions.php
Sources
- CVE List CVE-2026-77188
- NVD CVE-2026-77188
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.