Instantio — Side Cart & One-Page Checkout for WooCommerce vulnerabilities
Plugin slug instantio · 4 known vulnerabilities · latest disclosed 2026-03-25 · WordPress.org page
Every listed vulnerability has a fix. Version 3.3.31 or later is not affected by any of them. If your site runs an older version, update it.
2 of 4 rated high or critical (CVSS 7 or more).
Known vulnerabilities in Instantio — Side Cart & One-Page Checkout for WooCommerce
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 5.3 | <= 3.3.30 | 3.3.31 | CVE-2026-39571 | 2026-03-25 | Advisory |
| High 7.2 | <= 3.3.16 | 3.3.17 | CVE-2025-47550 | 2025-05-07 | Advisory |
| Medium 5.3 | <= 3.3.7 | 3.3.8 | CVE-2025-24581 | 2024-12-18 | Advisory |
| High 8.8 | <= 1.2.5 | 1.2.6 | none | 2021-06-30 | Advisory |
Check if a site is affected
Enter a site address to see which version of Instantio — Side Cart & One-Page Checkout for WooCommerce and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the Instantio — Side Cart & One-Page Checkout for WooCommerce plugin safe to use?
All 4 known issues are fixed in current versions (3.3.31 or later). Keeping it updated is what matters.
How do I check which version of Instantio — Side Cart & One-Page Checkout for WooCommerce my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.