# WPChat <= 1.4.5 - Unauthenticated Missing Authorization to API Access Token Update

- **ID:** WPSEC-2026-3064
- **Plugin:** WPChat – Live Chat & Messaging Widget for Customer Support (`smashballoon-wpchat-livechat-customer-support`), https://wordpress.org/plugins/smashballoon-wpchat-livechat-customer-support/
- **Affected versions:** all versions before 1.4.6
- **Fixed in:** 1.4.6 (Update to 1.4.6 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-11-13)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/smashballoon-wpchat-livechat-customer-support
- **Fix released:** 2026-11-12
- **Published:** 2026-11-13
- **URL:** https://wpsec.com/vuln/WPSEC-2026-3064/

## Description

The WPChat plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 1.4.5 due to a missing capability check and nonce verification on the handleAccessToken function. The function is hooked to admin_init, which also runs for unauthenticated requests to admin-post.php. This makes it possible for unauthenticated attackers to overwrite the site's WPChat Smart Search API access token with a value of their choosing, or to do the same by tricking an administrator into clicking a crafted link.

## References

- https://wpsec.com/vuln/WPSEC-2026-3064/
- https://plugins.svn.wordpress.org/smashballoon-wpchat-livechat-customer-support/tags/1.4.6/
- https://wordpress.org/plugins/smashballoon-wpchat-livechat-customer-support/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-3064/

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.