CVE-2026-89100 Cross-site scripting in Payment Plugins for Stripe WooCommerce
Unauthenticated attackers can inject arbitrary scripts via URL fragments in the Stripe WooCommerce plugin when Generic Errors are disabled, leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-89100?
CVE-2026-89100 is a medium-severity cross-site scripting vulnerability in paymentplugins Payment Plugins for Stripe WooCommerce, published on 10 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Payment Plugins for Stripe WooCommerce plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via '#response' URL Fragment in all versions up to, and including, 4.0.17 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that the 'Generic Errors' setting is unchecked, causing getErrorMessage() to return the raw Stripe error string unchanged rather than substituting a mapped safe message.
Weakness: CWE-79
Which versions are affected by CVE-2026-89100?
How do I fix CVE-2026-89100?
No fix has been published for CVE-2026-89100 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-89100 being exploited?
There is no known exploitation of CVE-2026-89100 in the wild and no public exploit code.
Sources
Also known as GHSA-775r-g6cx-c684.