# GS Team Members <= 2.8.2 - Authenticated (Contributor+) PHP Object Injection via Asset Cache Post Meta

- **ID:** WPSEC-2026-0880
- **Plugin:** Team Members – A WordPress Team Plugin with Gallery, Grid, Carousel, Slider, Table, List, and More (`gs-team-members`), https://wordpress.org/plugins/gs-team-members/
- **Affected versions:** all versions before 2.8.3
- **Fixed in:** 2.8.3 (Update to 2.8.3 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 Low, affected versions None seen (as of 2026-10-14)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/gs-team-members
- **Fix released:** 2026-10-13
- **Published:** 2026-10-14
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0880/

## Description

The Team Members plugin for WordPress is vulnerable to PHP Object Injection via the asset cache post meta (gsp--gs-team--assets) in all versions up to, and including, 2.8.2, due to deserialization of the stored meta value with maybe_unserialize() without restricting classes, combined with the meta key not being protected from being set through custom fields or XML-RPC. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject a PHP object that is instantiated when the post is viewed or previewed. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

## References

- https://wpsec.com/vuln/WPSEC-2026-0880/
- https://plugins.svn.wordpress.org/gs-team-members/tags/2.8.3/
- https://wordpress.org/plugins/gs-team-members/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0880/

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.