# 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.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **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 available:** No
- **Published:** 10 Oct 2026
- **Updated:** 11 Oct 2026
- **Also known as:** GHSA-775r-g6cx-c684

## 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 (Improper Neutralization of Input During Web Page Generation)

## 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.

## Is CVE-2026-89100 being exploited?

There is no known exploitation of CVE-2026-89100 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-89100 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-89100 in the wild and no public exploit code.

Affected product: paymentplugins Payment Plugins for Stripe WooCommerce. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-89100/ (Markdown: https://insights.sbomify.com/CVE-2026-89100/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-89100
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-89100
- OSV: https://osv.dev/vulnerability/CVE-2026-89100

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-89100/
Summaries are generated and may contain mistakes; the official description above is the record.