# GS Team Members <= 2.8.2 - Authenticated (Subscriber+) Missing Authorization to Freemius Account Connection

- **ID:** WPSEC-2026-0879
- **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:** Medium 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **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-2026-0879/

## Description

The Team Members plugin for WordPress is vulnerable to unauthorized modification of data via the opt-in/connect handler (_install_with_new_user) of the bundled Freemius SDK in all versions up to, and including, 2.8.2, due to a missing capability check. This makes it possible for authenticated attackers, with Subscriber-level access and above, to complete the Freemius opt-in for the site with attacker-supplied account and install keys, or put it into pending activation. This can link the site's Freemius connection to an account the attacker controls and change the tracking permissions.

## References

- https://wpsec.com/vuln/WPSEC-2026-0879/
- 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-2026-0879/

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.