# CVE-2026-75983: Privilege escalation in Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce

> Authenticated attackers with user ID 1 can escalate privileges to administrator and execute code if the account was demoted from admin.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Sep 2026
- **Updated:** 15 Sep 2026
- **Also known as:** GHSA-4pw8-cp9g-3xr7

## What is CVE-2026-75983?

CVE-2026-75983 is a high-severity vulnerability in arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.1.23. This is due to the `PermissionManager::manage_permissions()` function being registered as a callback on WordPress core's `map_meta_cap` filter and unconditionally returning the always-true `'exist'` primitive for every capability check whenever the evaluated user ID is 1, without scoping this behavior to plugin-specific capabilities. This makes it possible for authenticated attackers whose account is user ID 1, even subscribers, to pass every WordPress capability check, including `manage_options`, `edit_plugins`, `edit_themes`, `promote_users`, and `update_core`, thereby elevating their privileges to administrator-equivalent power and achieving full site takeover, including remote code execution via the plugin and theme editors. Exploitation is only impactful when user ID 1 has been deliberately demoted to a lower-privilege role as a common administrator-account hardening practice; on default installations where user ID 1 retains the administrator role, no incremental privilege gain occurs.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2026-75983?


## How do I fix CVE-2026-75983?

No fix has been published for CVE-2026-75983 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-75983 being exploited?

There is no known exploitation of CVE-2026-75983 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-75983 and fix it if it is affected.

What it is: CVE-2026-75983 is a high-severity vulnerability in arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-75983 in the wild and no public exploit code.

Affected product: arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce. 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-2026-75983/ (Markdown: https://insights.sbomify.com/CVE-2026-75983/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-75983
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-75983
- OSV: https://osv.dev/vulnerability/CVE-2026-75983

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-75983/
Summaries are generated and may contain mistakes; the official description above is the record.