Quick answers
- Is CVE-2026-89100 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-89100 being exploited in the wild.
- How severe is CVE-2026-89100?
- Medium severity, with a CVSS score of 6.1, published 10 October 2026.
- Which products and versions are affected?
- Payment Plugins Stripe For WooCommerce up to and including 4.0.17.
- Is there a fix for CVE-2026-89100?
- No fixed version is recorded yet. Enable the "Generic Errors" setting in the plugin configuration to ensure error messages are replaced with safe mapped strings instead of raw Stripe errors. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-89100 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-89100?
- Check whether you run Payment Plugins Stripe For WooCommerce at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
Enable the "Generic Errors" setting in the plugin configuration to ensure error messages are replaced with safe mapped strings instead of raw Stripe errors.
Technical details
The plugin fails to sanitize and escape the '#response' URL fragment, allowing reflected cross-site scripting (XSS). When the Generic Errors setting is unchecked, getErrorMessage() returns unfiltered Stripe error strings, permitting arbitrary JavaScript injection. Exploitation requires a user to click a malicious link; no authentication is needed.
Affected products
- Payment Plugins Stripe for WooCommerce up to and including 4.0.17
Timeline
- 2026-10-10: disclosed