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.
- 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
- None listed
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
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.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-15233 being exploited?
There is no known exploitation of CVE-2026-15233 in the wild and no public exploit code.
Sources
Also known as GHSA-6q78-rg7f-8258.