PatchSiren cyber security CVE debrief
CVE-2026-7795 holithemes CVE debrief
The Click to Chat – WA Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [chat] shortcode 'num' parameter in all versions up to, and including, 4.38. This is due to insufficient escaping when embedding user-supplied shortcode attribute values inside JavaScript string literals that are then placed in HTML event-handler attributes.
- Vendor
- holithemes
- Product
- Click to Chat – HoliThemes
- CVSS
- MEDIUM 6.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-06
- Original CVE updated
- 2026-06-08
- Advisory published
- 2026-06-06
- Advisory updated
- 2026-06-08
Who should care
Authenticated attackers with Contributor-level access and above can inject arbitrary web scripts into pages that will execute whenever a user clicks the WhatsApp chat button rendered by the [chat] shortcode.
Technical summary
The CCW_Shortcode::shortcode() function applies esc_attr() to the 'num' parameter, which converts single quotes to the HTML entity '. However, browsers HTML-decode event attribute values before executing the embedded JavaScript, allowing the injected payload to break out of the JavaScript string context and execute arbitrary code.
Defensive priority
MEDIUM
Recommended defensive actions
- Update to a patched version of the Click to Chat – WA Widget plugin (version 4.39 or later).
- Limit access to the plugin's shortcode functionality to trusted users only.
Evidence notes
The vulnerability was reported by [email protected].
Official resources
CVE-2026-7795 was published on 2026-06-06T04:17:40.870Z and modified on 2026-06-08T14:57:14.757Z.