# CVE-2026-16260: Post Grid, Slider & Carousel Ultimate < 1.8.1 - Contributor+ Stored XSS via Header Title Field

> Contributors can inject JavaScript via header titles, leading to admin session hijacking or code execution when viewed.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H`)
- **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:** 22 Aug 2026
- **Updated:** 23 Aug 2026
- **Also known as:** GHSA-9jf6-vw36-77hj

## What is CVE-2026-16260?

CVE-2026-16260 is a medium-severity cross-site scripting vulnerability in Unknown Post Grid, Slider & Carousel Ultimate, published on 22 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 Post Grid, Slider & Carousel Ultimate  WordPress plugin before 1.8.1 does not sanitise and escape one of its custom post type settings before outputting it in an HTML attribute on the admin edit screen, allowing users with the Contributor role and above to inject JavaScript that executes in the session of any administrator who opens the affected item.

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

## Which versions are affected by CVE-2026-16260?


## How do I fix CVE-2026-16260?

No fix has been published for CVE-2026-16260 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16260 being exploited?

There is no known exploitation of CVE-2026-16260 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16260 and fix it if it is affected.

What it is: CVE-2026-16260 is a medium-severity cross-site scripting vulnerability in Unknown Post Grid, Slider & Carousel Ultimate, published on 22 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-2026-16260 in the wild and no public exploit code.

Affected product: Unknown Post Grid, Slider & Carousel Ultimate. 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-2026-16260/ (Markdown: https://insights.sbomify.com/CVE-2026-16260/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16260
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16260
- OSV: https://osv.dev/vulnerability/CVE-2026-16260

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16260/
Summaries are generated and may contain mistakes; the official description above is the record.