# CVE-2026-13609: Frontend Admin by DynamiApps < 3.29.9 - Unauthenticated Stored Cross-Site Scripting via Form Field

> Unauthenticated attackers can inject stored XSS payloads via form fields, potentially hijacking administrator sessions when they view the affected pages.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 31 Jul 2026
- **Updated:** 31 Jul 2026
- **Also known as:** GHSA-pgxc-8xw2-rggm

## What is CVE-2026-13609?

CVE-2026-13609 is a high-severity cross-site scripting vulnerability in Unknown Frontend Admin by DynamiApps, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The Frontend Admin by DynamiApps WordPress plugin before 3.29.9 decodes HTML entities in a submitted form field value after sanitizing it, which restores HTML tags that the sanitizer had neutralized. A double-encoded payload submitted by an unauthenticated visitor is therefore stored as a live tag and later output without escaping on the Frontend Admin by DynamiApps WordPress plugin before 3.29.9's front-end display surfaces, resulting in stored cross-site scripting that executes in the browser of any user, including an administrator, who views a page displaying the submitted value.

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

## Which versions are affected by CVE-2026-13609?


## How do I fix CVE-2026-13609?

No fix has been published for CVE-2026-13609 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-13609 being exploited?

There is no known exploitation of CVE-2026-13609 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13609 and fix it if it is affected.

What it is: CVE-2026-13609 is a high-severity cross-site scripting vulnerability in Unknown Frontend Admin by DynamiApps, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-13609 in the wild and no public exploit code.

Affected product: Unknown Frontend Admin by DynamiApps. 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-2026-13609/ (Markdown: https://insights.sbomify.com/CVE-2026-13609/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13609
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13609
- OSV: https://osv.dev/vulnerability/CVE-2026-13609

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-13609/
Summaries are generated and may contain mistakes; the official description above is the record.