SupportCandy <= 3.5.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'name' 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 SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name' parameter in all versions up to, and including, 3.5.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This exploit chain requires the 'Register user if not exists' setting to be disabled, which is its default configuration.
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 |
|---|---|---|---|---|---|
| psmplugins | SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent | up to 3.5.3 | — | No fix listed | CNA |
- SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent Vendorpsmplugins Affected up to 3.5.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-03 Threatist record created from CVE-2026-94378
- 2026-10-03 Alias added: GHSA-8cxj-g538-75wh
- 2026-10-03 CISA SSVC decision points changed
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9703fa76-fd73-4cd8-aa41-8adcb55190be?source=cve
- https://plugins.trac.wordpress.org/browser/supportcandy/tags/3.5.3/includes/admin/recent-activities/class-wpsc-ra-logs.php#L207
- https://plugins.trac.wordpress.org/browser/supportcandy/tags/3.5.3/includes/custom-field-types/class-wpsc-df-customer.php#L464
- https://plugins.trac.wordpress.org/browser/supportcandy/tags/3.5.3/includes/custom-field-types/class-wpsc-df-customer.php#L681
- https://plugins.trac.wordpress.org/browser/supportcandy/tags/3.5.3/includes/custom-field-types/class-wpsc-df-agent-created.php#L492
- https://plugins.svn.wordpress.org/supportcandy/
- https://plugins.trac.wordpress.org/changeset/3718257/supportcandy/trunk/includes/custom-field-types/class-wpsc-df-customer.php
More psmplugins vulnerabilities
- TI-2026-51470 WordPress SupportCandy plugin <= 3.5.1 - Broken Authentication vulnerability CVSS 3.1HIGH 8.2
- TI-2025-09757 SupportCandy – Helpdesk & Customer Support Ticket System <= 3.3.7 - Authentication Bypass to Support Session Takeover CVSS 3.1MEDIUM 6.5
- TI-2026-39629 WordPress SupportCandy plugin <= 3.4.6 - Insecure Direct Object References (IDOR) vulnerability CVSS 3.1HIGH 7.6
- TI-2026-20439 WordPress SupportCandy plugin <= 3.4.4 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
- TI-2026-00475 SQL injection in psmplugins SupportCandy – Helpdesk & Customer Support Ticket System CVSS 3.1MEDIUM 6.5
- TI-2026-67401 SupportCandy <= 3.5.3 - Authenticated (Custom+) SQL Injection via 'sort_by' Parameter CVSS 3.1MEDIUM 6.5
Sources
- CVE-2026-94378 · CVE Program
- CVE-2026-94378 · NVD
- FIRST EPSS
- GHSA-8cxj-g538-75wh · 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