# CVE-2026-90951: Paid Member Subscriptions < 3.1.0 - Unauthenticated In-Flight Checkout State Deletion via pms_process_payment

> Unauthenticated attackers can delete other users' checkout states by exploiting missing authorization in the payment processing action.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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:** 23 Sep 2026
- **Updated:** 23 Sep 2026
- **Also known as:** GHSA-rxfw-g454-gj22

## What is CVE-2026-90951?

CVE-2026-90951 is a low-severity missing authorization vulnerability in Unknown Paid Membership Subscriptions, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Paid Membership Subscriptions  WordPress plugin before 3.1.0 does not bind one of its unauthenticated payment actions to the requesting user, allowing someone who holds another member's in-flight payment identifier to delete that member's checkout state.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-90951?


## How do I fix CVE-2026-90951?

No fix has been published for CVE-2026-90951 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90951 being exploited?

There is no known exploitation of CVE-2026-90951 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90951 and fix it if it is affected.

What it is: CVE-2026-90951 is a low-severity missing authorization vulnerability in Unknown Paid Membership Subscriptions, published on 23 Sep 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-2026-90951 in the wild and no public exploit code.

Affected product: Unknown Paid Membership Subscriptions. 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-2026-90951/ (Markdown: https://insights.sbomify.com/CVE-2026-90951/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90951
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90951
- OSV: https://osv.dev/vulnerability/CVE-2026-90951

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90951/
Summaries are generated and may contain mistakes; the official description above is the record.