# CVE-2026-15233: Nested Pages < 3.2.15 - Editor+ Stored XSS via Post Title

> Editors can inject JavaScript via post titles, leading to session hijacking or code execution when administrators view the listing screen.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Aug 2026
- **Updated:** 4 Aug 2026
- **Also known as:** GHSA-6q78-rg7f-8258

## What is CVE-2026-15233?

CVE-2026-15233 is a medium-severity cross-site scripting vulnerability in Unknown Nested Pages, published on 4 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

The Nested Pages WordPress plugin before 3.2.15 does not properly escape post titles before outputting them into HTML attributes on an administrative listing screen, allowing users with the Editor role (or Contributor/Author when the Nested Pages WordPress plugin before 3.2.15 is enabled for the post type) to inject arbitrary JavaScript that executes in the session of any higher-privileged user who views that screen.

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

## Which versions are affected by CVE-2026-15233?


## How do I fix CVE-2026-15233?

No fix has been published for CVE-2026-15233 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15233 being exploited?

There is no known exploitation of CVE-2026-15233 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15233 and fix it if it is affected.

What it is: CVE-2026-15233 is a medium-severity cross-site scripting vulnerability in Unknown Nested Pages, published on 4 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-15233 in the wild and no public exploit code.

Affected product: Unknown Nested Pages. 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-2026-15233/ (Markdown: https://insights.sbomify.com/CVE-2026-15233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15233
- OSV: https://osv.dev/vulnerability/CVE-2026-15233

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15233/
Summaries are generated and may contain mistakes; the official description above is the record.