Click to Chat <= 4.22 - Authenticated (Contributor+) Stored DOM-Based Cross-Site Scripting via data-no_number Parameter
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Click to Chat plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘data-no_number’ parameter in all versions up to, and including, 4.22 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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| holithemes | Click to Chat – HoliThemes | up to 4.22 | — | No fix listed | CNA |
- Click to Chat – HoliThemes Vendorholithemes Affected up to 4.22 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-5336
- 2026-10-03 Alias added: GHSA-83pp-hvhj-8fv5
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/83695ac4-a08b-4c25-ac33-d9b7498f5a2c?source=cve
- https://wordpress.org/plugins/click-to-chat-for-whatsapp/#developers
- https://plugins.trac.wordpress.org/browser/click-to-chat-for-whatsapp/tags/4.22/new/inc/assets/js/dev/app.dev.js#L126
- https://plugins.trac.wordpress.org/browser/click-to-chat-for-whatsapp/tags/4.22/new/inc/assets/js/dev/app.dev.js#L818
- https://plugins.trac.wordpress.org/changeset/3309693/
More holithemes vulnerabilities
- TI-2022-04095 Click to Chat < 3.18.1 - Contributor+ Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2026-73776 Click to Chat <= 4.44 - Unauthenticated Arbitrary Shortcode Execution via REQUEST_URI via {url} Placeholder CVSS 3.1CRITICAL 9.1
- TI-2024-03589 Click to Chat – HoliThemes <= 3.35 - Authenticated (Contributor+) Local File Inclusion CVSS 3.1HIGH 8.8
- TI-2026-06863 Click to Chat <= 4.39 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Parameter CVSS 3.1MEDIUM 6.4
- TI-2024-08924 WP SHAPES <= 1.0.0 - Authenticated (Author+) Stored Cross-Site Scripting via SVG File Upload CVSS 3.1MEDIUM 6.4
Sources
- CVE-2025-5336 · CVE Program
- CVE-2025-5336 · NVD
- FIRST EPSS
- GHSA-83pp-hvhj-8fv5 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences