# CVE-2026-8438: All-In-One Security (AIOS) <= 5.4.7 - Unauthenticated Stored Cross-Site Scripting via REST API Request Path

> Unauthenticated attackers can inject scripts via REST API paths that execute in admin browsers when debug logging is enabled, risking site compromise.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jun 2026
- **Updated:** 6 Jun 2026
- **Also known as:** GHSA-p64v-fh44-3cqj

## What is CVE-2026-8438?

CVE-2026-8438 is a high-severity cross-site scripting vulnerability in davidanderson All-In-One Security (AIOS) – Security and Firewall, published on 6 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The All-In-One Security (AIOS) – Security and Firewall plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 5.4.7. This is due to insufficient input sanitization in the get_rest_route() function and missing output escaping in the column_default() method of the debug log list table. When the 'Disable REST API for non-logged in users' feature (aiowps_disallow_unauthorized_rest_requests) is enabled alongside debug logging (aiowps_enable_debug), an unauthenticated attacker can embed arbitrary HTML or JavaScript in the REST request path. The path is retrieved via urldecode($_SERVER['REQUEST_URI']), which decodes URL-encoded payloads into literal HTML characters. This decoded, unsanitized value is concatenated directly into a debug log message and stored in the database. When an administrator navigates to the AIOS Dashboard Debug Logs page, the column_default() method returns the raw database value without escaping, and the parent list table echoes it directly, causing JavaScript execution in the administrator's browser session. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the debug log page, enabling nonce theft, privileged AJAX/REST actions, and potential full site compromise.

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

## Which versions are affected by CVE-2026-8438?


## How do I fix CVE-2026-8438?

No fix has been published for CVE-2026-8438 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8438 being exploited?

There is no known exploitation of CVE-2026-8438 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8438 and fix it if it is affected.

What it is: CVE-2026-8438 is a high-severity cross-site scripting vulnerability in davidanderson All-In-One Security (AIOS) – Security and Firewall, published on 6 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-8438 in the wild and no public exploit code.

Affected product: davidanderson All-In-One Security (AIOS) – Security and Firewall. 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-2026-8438/ (Markdown: https://insights.sbomify.com/CVE-2026-8438/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8438
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8438
- OSV: https://osv.dev/vulnerability/CVE-2026-8438

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-8438/
Summaries are generated and may contain mistakes; the official description above is the record.