# CVE-2025-15664: BEAF < 4.7.19 - Author+ Stored XSS via Before Label

> Authors can inject malicious scripts via slider labels that execute in administrators' browsers, potentially leading to account takeover.

- **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:** 2 Sep 2026
- **Updated:** 2 Sep 2026
- **Also known as:** GHSA-jmj2-wp2q-8p2g

## What is CVE-2025-15664?

CVE-2025-15664 is a medium-severity cross-site scripting vulnerability in Unknown Ultimate Before After Image Slider & Gallery, published on 2 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

The Ultimate Before After Image Slider & Gallery  WordPress plugin before 4.7.19 does not properly escape the slider's before-label value before its bundled client-side script re-injects it into the DOM, allowing users with the Author role and above to store a payload that executes in the browser of anyone (including an administrator) who views the slider.

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

## Which versions are affected by CVE-2025-15664?


## How do I fix CVE-2025-15664?

No fix has been published for CVE-2025-15664 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-15664 being exploited?

There is no known exploitation of CVE-2025-15664 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-15664 and fix it if it is affected.

What it is: CVE-2025-15664 is a medium-severity cross-site scripting vulnerability in Unknown Ultimate Before After Image Slider & Gallery, published on 2 Sep 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-2025-15664 in the wild and no public exploit code.

Affected product: Unknown Ultimate Before After Image Slider & Gallery. 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-2025-15664/ (Markdown: https://insights.sbomify.com/CVE-2025-15664/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-15664
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-15664
- OSV: https://osv.dev/vulnerability/CVE-2025-15664

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-15664/
Summaries are generated and may contain mistakes; the official description above is the record.