Click to Chat <= 4.39 — Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Parameter
CVE-2026-7795Published · Updated Action summary
Affected: ≤4.39Update to 4.40 or newer
All remediation steps- Severity
- Medium6.4
- CVSS
- 6.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Click to Chat – HoliThemes click-to-chat-for-whatsapp
- Affected≤ 4.39
- Patched in4.40
Update to 4.40 or newer.
You are affected if you run ≤ 4.39. Version 4.40 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Click to Chat – HoliThemes.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.40, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Click to Chat – HoliThemes to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Vijay.
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. The CCW_Shortcode::shortcode() function applies esc_attr() to the 'num' parameter (line 157), which converts single quotes to the HTML entity '. This entity-encoded value is then interpolated directly into a JavaScript window.open() call string delimited by single quotes (line 194/221), and that complete string is placed verbatim into an HTML onclick attribute in the style template files (e.g., sc-style-1.php line 6). Because browsers HTML-decode event attribute values before executing the embedded JavaScript, the ' entities are decoded back to literal single quotes at runtime, allowing the injected payload to break out of the JavaScript string context and execute arbitrary code. This makes it possible for authenticated attackers with Contributor-level access and above to inject arbitrary web scripts into pages that will execute whenever a user clicks the WhatsApp chat button rendered by the [chat] shortcode.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Click to Chat – HoliThemes
All 5| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Critical9.1 | Unauthenticated Arbitrary Shortcode Execution via REQUEST_URI via {url} Placeholder ≤4.44Update to 4.45 | CVE-2026-92097 | |
| Medium6.4 | Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via data-no_number Parameter ≤4.22Update to 4.23 | CVE-2025-5336 | |
| High8.8 | Authenticated (Contributor+) Local File Inclusion ≤3.35Update to 4.0 | CVE-2024-3849 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode ≤3.18Update to 3.18.1 | CVE-2022-4480 |
- Critical9.1Unauthenticated Arbitrary Shortcode Execution via REQUEST_URI via {url} Placeholder
≤4.44Update to 4.45
- Medium6.4Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via data-no_number Parameter
≤4.22Update to 4.23
- High8.8Authenticated (Contributor+) Local File Inclusion
≤3.35Update to 4.0
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
≤3.18Update to 3.18.1
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.4
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.