# SEOPress <= 10.3 - Authenticated (Contributor+) PHP Object Injection via Content Analysis Data

- **ID:** WPSEC-2026-2010
- **Plugin:** SEOPress – AI SEO Plugin & On-site SEO (`wp-seopress`), https://wordpress.org/plugins/wp-seopress/
- **Affected versions:** all versions before 10.4
- **Fixed in:** 10.4 (Update to 10.4 or later.)
- **Severity:** High 7.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **Weakness:** CWE-502
- **Usage among sites WPSec scans:** plugin Medium, affected versions Medium (as of 2026-10-30)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/wp-seopress
- **Fix released:** 2026-10-29
- **Published:** 2026-10-30
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2010/

## Description

The SEOPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.3 due to deserialization of untrusted input when reading stored content analysis rows, where every column, including author-controlled text such as the post title, was passed through maybe_unserialize. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject a PHP object. No known POP chain is present in the vulnerable software itself; if a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

## References

- https://wpsec.com/vuln/WPSEC-2026-2010/
- https://plugins.svn.wordpress.org/wp-seopress/tags/10.4/
- https://wordpress.org/plugins/wp-seopress/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2010/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.