CVE-2026-107711 Details
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.
A stored cross-site scripting vulnerability has been identified in the FlexStock – Product Stock Sync with Google Sheets for WooCommerce plugin for WordPress, affecting all versions through 3.17.2. The vulnerability arises from inadequate input sanitization and output escaping, allowing authenticated attackers with subscriber-level access and above to inject arbitrary scripts into pages. These scripts execute when a user accesses the compromised page. This issue is exploitable by any subscriber-level user because the plugin improperly exposes the REST bearer token in the Dashboard page source without a capability check. As a result, the REST endpoint's permission validation can be bypassed, leading to the injection of malicious scripts.
Users are advised to update the FlexStock – Product Stock Sync with Google Sheets for WooCommerce plugin to version 3.17.3 or a newer patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 31, 2026CISA-ADP
Assessed Nov 1, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| FlexStock | <= 3.17.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 1, 2026 | CVE Modified | CISA-ADP |
| Oct 31, 2026 | New CVE Received | [email protected] |