# CVE-2026-87965: Easy Appointments < 4.0.2.2 - Unauthenticated Appointment Cancellation/Confirmation via Forgeable Email-Link Token

> Unauthenticated attackers can cancel or confirm arbitrary appointments by forging email-link tokens derived from predictable timestamps.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2026
- **Updated:** 18 Sep 2026
- **Also known as:** GHSA-w73j-m9cj-hp9q

## What is CVE-2026-87965?

CVE-2026-87965 is a medium-severity authentication bypass vulnerability in Unknown Easy Appointments, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Easy Appointments WordPress plugin before 4.0.2.2 does not use an unguessable token to authorize its mail-link appointment cancellation and confirmation action, deriving the token from a hardcoded source-embedded salt and the appointment's creation timestamp, so unauthenticated attackers who know or guess that timestamp can cancel or confirm arbitrary appointments.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-87965?


## How do I fix CVE-2026-87965?

No fix has been published for CVE-2026-87965 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-87965 being exploited?

There is no known exploitation of CVE-2026-87965 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-87965 and fix it if it is affected.

What it is: CVE-2026-87965 is a medium-severity authentication bypass vulnerability in Unknown Easy Appointments, published on 18 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-2026-87965 in the wild and no public exploit code.

Affected product: Unknown Easy Appointments. 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-2026-87965/ (Markdown: https://insights.sbomify.com/CVE-2026-87965/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-87965
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87965
- OSV: https://osv.dev/vulnerability/CVE-2026-87965

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-87965/
Summaries are generated and may contain mistakes; the official description above is the record.