# CVE-2026-94378: SupportCandy <= 3.5.3 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'name' Parameter

> Authenticated attackers can inject arbitrary scripts via the name parameter in SupportCandy, executing them when users view pages.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Oct 2026
- **Updated:** 3 Oct 2026
- **Also known as:** GHSA-8cxj-g538-75wh

## What is CVE-2026-94378?

CVE-2026-94378 is a medium-severity cross-site scripting vulnerability in psmplugins SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent, published on 3 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-94378?


## How do I fix CVE-2026-94378?

No fix has been published for CVE-2026-94378 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-94378 being exploited?

There is no known exploitation of CVE-2026-94378 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94378 and fix it if it is affected.

What it is: CVE-2026-94378 is a medium-severity cross-site scripting vulnerability in psmplugins SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent, published on 3 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-94378 in the wild and no public exploit code.

Affected product: psmplugins SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-94378/ (Markdown: https://insights.sbomify.com/CVE-2026-94378/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94378
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94378
- OSV: https://osv.dev/vulnerability/CVE-2026-94378

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-94378/
Summaries are generated and may contain mistakes; the official description above is the record.