# CVE-2026-1461: Simple Membership <= 4.7.0 - Unauthenticated Improper Handling of Missing Values

> Unauthenticated attackers can forge Stripe webhooks to manipulate membership subscriptions, bypassing payment validation and altering user access states.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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:** 19 Feb 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-h972-rpm4-hj8q

## What is CVE-2026-1461?

CVE-2026-1461 is a medium-severity vulnerability in wpinsider-1 Simple Membership, published on 19 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Simple Membership plugin for WordPress is vulnerable to Improper Handling of Missing Values in all versions up to, and including, 4.7.0 via the Stripe webhook handler. This is due to the plugin only validating webhook signatures when the stripe-webhook-signing-secret setting is configured, which is empty by default. This makes it possible for unauthenticated attackers to forge Stripe webhook events to manipulate membership subscriptions, including reactivating expired memberships without payment or canceling legitimate subscriptions, potentially leading to unauthorized access and service disruption.

Weakness: CWE-230 (Improper Handling of Missing Values)

## Which versions are affected by CVE-2026-1461?


## How do I fix CVE-2026-1461?

No fix has been published for CVE-2026-1461 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1461 being exploited?

There is no known exploitation of CVE-2026-1461 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1461 and fix it if it is affected.

What it is: CVE-2026-1461 is a medium-severity vulnerability in wpinsider-1 Simple Membership, published on 19 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-1461 in the wild and no public exploit code.

Affected product: wpinsider-1 Simple Membership. 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-2026-1461/ (Markdown: https://insights.sbomify.com/CVE-2026-1461/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1461
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1461
- OSV: https://osv.dev/vulnerability/CVE-2026-1461

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1461/
Summaries are generated and may contain mistakes; the official description above is the record.