# CVE-2026-80072: User Registration & Membership < 5.2.8 - Unauthenticated Open Redirect via Login Redirect Parameters

> Unauthenticated attackers can redirect users to arbitrary external URLs via login parameters, facilitating phishing attacks against WordPress users.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/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:** 13 Sep 2026
- **Updated:** 13 Sep 2026
- **Also known as:** GHSA-w78c-fx7q-9x8m

## What is CVE-2026-80072?

CVE-2026-80072 is a medium-severity vulnerability in Unknown User Registration & Membership, published on 13 Sep 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 User Registration & Membership  WordPress plugin before 5.2.8 does not validate the destination of a post-login redirect before redirecting, allowing unauthenticated attackers to redirect visitors to an arbitrary external URL, which can be abused for phishing.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-80072?


## How do I fix CVE-2026-80072?

No fix has been published for CVE-2026-80072 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-80072 being exploited?

There is no known exploitation of CVE-2026-80072 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80072 and fix it if it is affected.

What it is: CVE-2026-80072 is a medium-severity vulnerability in Unknown User Registration & Membership, published on 13 Sep 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-2026-80072 in the wild and no public exploit code.

Affected product: Unknown User Registration & 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-2026-80072/ (Markdown: https://insights.sbomify.com/CVE-2026-80072/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80072
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80072
- OSV: https://osv.dev/vulnerability/CVE-2026-80072

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-80072/
Summaries are generated and may contain mistakes; the official description above is the record.