FlexStock <= 3.17.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'post_content' Parameter via REST update endpoint
Summary
| CVE | CVE-2026-107711 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-31 10:16:37 UTC |
| Updated | 2026-11-02 16:19:19 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 6.4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
EPSS: 0.003420000 probability, percentile 0.277350000 (date 2026-11-02)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Wppool | FlexStock Product Stock Sync With Google Sheets For WooCommerce | affected 3.17.2 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/changeset/3768111/stock-sync-with-google-sheet-for-woocommerc... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/stock-sync-with-google-sheet-for-woocommerce/tags/3.1... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/b03cabc6-1cbe-4aa2-8eae-cea30... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/stock-sync-with-google-sheet-for-woocommerce/tags/3.1... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/stock-sync-with-google-sheet-for-woocommerce/tags/3.1... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/stock-sync-with-google-sheet-for-woocommerce/tags/3.1... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/stock-sync-with-google-sheet-for-woocommerce/tags/3.1... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/stock-sync-with-google-sheet-for-woocommerce/tags/3.1... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Morato Antoine (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-12T16:38:03.000Z | Vendor Notified |
| CNA | 2026-10-30T21:11:02.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.