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Fencer Intel
high 8.8

CVE-2021-4337 json

Multiple XforWooCommerce Add-On Plugins (Various Versions) - Missing Authorization

published 3y ago modified 4mo ago also EUVD-2021-34164

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

Sixteen XforWooCommerce Add-On Plugins for WordPress are vulnerable to authorization bypass due to a missing capability check on the wp_ajax_svx_ajax_factory function in various versions listed below. This makes it possible for authenticated attackers, with subscriber-level permissions and above, to read, edit, or delete WordPress settings, plugin settings, and to arbitrarily list all users on a WordPress website. The plugins impacted are: Product Filter for WooCommerce < 8.2.0, Improved Product Options for WooCommerce < 5.3.0, Improved Sale Badges for WooCommerce < 4.4.0, Share, Print and PDF Products for WooCommerce < 2.8.0, Product Loops for WooCommerce < 1.7.0, XforWooCommerce < 1.7.0, Package Quantity Discount < 1.2.0, Price Commander for WooCommerce < 1.3.0, Comment and Review Spam Control for WooCommerce < 1.5.0, Add Product Tabs for WooCommerce < 1.5.0, Autopilot SEO for WooCommerce < 1.6.0, Floating Cart < 1.3.0, Live Search for WooCommerce < 2.1.0, Bulk Add to Cart for WooCommerce < 1.3.0, Live Product Editor for WooCommerce < 4.7.0, and Warranties and Returns for WooCommerce < 5.3.0.

Patch / fix

  • XforWooCommerce Package Quantity Discount 1.2.0
  • XforWooCommerce Price Commander for WooCommerce 1.3.0
  • XforWooCommerce Bulk Add to Cart for WooCommerce 1.3.0
  • XforWooCommerce Floating Cart for WooCommerce 1.3.0
  • XforWooCommerce Comment and Review Spam Control for WooCommerce 1.5.0
  • XforWooCommerce Add Product Tabs for WooCommerce 1.5.0
  • XforWooCommerce Autopilot SEO for WooCommerce 1.6.0
  • XforWooCommerce XforWooCommerce 1.7.0
  • XforWooCommerce Product Loops for WooCommerce 1.7.0
  • XforWooCommerce Live Search for WooCommerce 2.1.0
  • XforWooCommerce Share, Print and PDF Products for WooCommerce 2.8.0
  • XforWooCommerce Improved Sale Badges for WooCommerce 4.4.0
  • XforWooCommerce Live Product Editor for WooCommerce 4.7.0
  • XforWooCommerce Warranties and Returns for WooCommerce 5.3.0
  • XforWooCommerce Improved Product Options for WooCommerce 5.3.0
  • XforWooCommerce Product Filter for WooCommerce 8.2.0

Is CVE-2021-4337 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

1.27% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • blog.nintechnet.com https://blog.nintechnet.com/16-woocommerce-product-add-ons-plugins-fixed-vulnerabilities/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • XforWooCommerce Package Quantity Discount
  • XforWooCommerce Price Commander for WooCommerce
  • XforWooCommerce Bulk Add to Cart for WooCommerce
  • XforWooCommerce Floating Cart for WooCommerce
  • XforWooCommerce Comment and Review Spam Control for WooCommerce
  • XforWooCommerce Add Product Tabs for WooCommerce
  • XforWooCommerce Autopilot SEO for WooCommerce
  • XforWooCommerce XforWooCommerce
  • XforWooCommerce Product Loops for WooCommerce
  • XforWooCommerce Live Search for WooCommerce
  • XforWooCommerce Share, Print and PDF Products for WooCommerce
  • XforWooCommerce Improved Sale Badges for WooCommerce
  • XforWooCommerce Live Product Editor for WooCommerce
  • XforWooCommerce Warranties and Returns for WooCommerce
  • XforWooCommerce Improved Product Options for WooCommerce
  • XforWooCommerce Product Filter for WooCommerce

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.