# CVE-2021-25025: Event Calendar < 1.1.51 - Subscriber+ Event Creation

> Subscribers can create calendar events due to missing authorization and CSRF checks in the EventCalendar WordPress plugin.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **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:** 17 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-96vj-582q-cvqw

## What is CVE-2021-25025?

CVE-2021-25025 is a medium-severity missing authorization vulnerability in Unknown EventCalendar, published on 17 Jan 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The EventCalendar WordPress plugin before 1.1.51 does not have proper authorisation and CSRF checks in the add_calendar_event AJAX actions, allowing users with a role as low as subscriber to create events

Weakness: CWE-862 (Missing Authorization), CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2021-25025?

It affects 1 product.


Products: Theeventscalendar Eventcalendar.

## How do I fix CVE-2021-25025?

No fix has been published for CVE-2021-25025 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25025 being exploited?

There is no known exploitation of CVE-2021-25025 in the wild and no public exploit code.

## Other vulnerabilities in Unknown EventCalendar

- [CVE-2021-25024](https://insights.sbomify.com/CVE-2021-25024/): Event Calendar < 1.1.51 - Reflected Cross-Site Scripting (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25025 and fix it if it is affected.

What it is: CVE-2021-25025 is a medium-severity missing authorization vulnerability in Unknown EventCalendar, published on 17 Jan 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-25025 in the wild and no public exploit code.

Affected product: Unknown EventCalendar. 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-2021-25025/ (Markdown: https://insights.sbomify.com/CVE-2021-25025/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25025
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25025
- OSV: https://osv.dev/vulnerability/CVE-2021-25025

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25025/
Summaries are generated and may contain mistakes; the official description above is the record.