Vulnerability · Published Oct 31, 2026 · Assigned by Wordfence

CVE-2026-107711FlexStock <= 3.17.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'post_content' Parameter via REST update endpoint

Medium 6.4

In plain English

A medium-severity cross-site scripting in FlexStock – Product Stock Sync with Google Sheets for WooCommerce from wppool. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.3%top 72.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The FlexStock – Product Stock Sync with Google Sheets for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'products[].post_content' parameter in all versions up to, and including, 3.17.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable by any Subscriber-level user because the plugin's admin_enqueue_scripts callback exposes the REST bearer token in the Dashboard page source via wp_localize_script() without a capability check, and the REST endpoint's permission_callback validates only that bearer token rather than performing a current_user_can() capability check.

Affected products (as reported)

Vendor	Product	Versions
wppool	FlexStock – Product Stock Sync with Google Sheets for WooCommerce	0 – through 3.17.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References