# CVE-2026-12901: GetPaid < 2.8.55 - Unauthenticated Worldpay Payment Bypass via Insufficient IPN Verification

> Unauthenticated attackers can forge Worldpay payment notifications to mark invoices as paid without actual payment, affecting GetPaid plugin users.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-w426-cmgx-r837

## What is CVE-2026-12901?

CVE-2026-12901 is a medium-severity vulnerability in Unknown GetPaid, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The GetPaid WordPress plugin before 2.8.55 does not verify the authenticity of incoming Worldpay payment notifications, allowing unauthenticated attackers to forge a notification that marks a pending invoice as paid without any payment being made.

Weakness: CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2026-12901?


## How do I fix CVE-2026-12901?

No fix has been published for CVE-2026-12901 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12901 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12901 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12901 and fix it if it is affected.

What it is: CVE-2026-12901 is a medium-severity vulnerability in Unknown GetPaid, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12901 exists.

Affected product: Unknown GetPaid. 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-2026-12901/ (Markdown: https://insights.sbomify.com/CVE-2026-12901/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12901
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12901
- OSV: https://osv.dev/vulnerability/CVE-2026-12901

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12901/
Summaries are generated and may contain mistakes; the official description above is the record.