# CVE-2021-24946: Modern Events Calendar < 6.1.5 - Unauthenticated Blind SQL Injection

> Unauthenticated attackers can exploit a SQL injection vulnerability in the Modern Events Calendar Lite plugin to read or modify database contents.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Dec 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-8cmg-w5hw-x6p6

## What is CVE-2021-24946?

CVE-2021-24946 is a critical SQL injection vulnerability in Unknown Modern Events Calendar Lite, published on 13 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Modern Events Calendar Lite WordPress plugin before 6.1.5 does not sanitise and escape the time parameter before using it in a SQL statement in the mec_load_single_page AJAX action, available to unauthenticated users, leading to an unauthenticated SQL injection issue

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)

## Which versions are affected by CVE-2021-24946?

It affects 1 product.


Products: Webnus Modern Events Calendar Lite.

## How do I fix CVE-2021-24946?

No fix has been published for CVE-2021-24946 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24946 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24946 exists.

Public exploit code:

- WordPress Modern Events Calendar SQLi Scanner (metasploit)
- WordPress Plugin Modern Events Calendar V 6.1 - SQL Injection (Unauthenticated) (exploitdb)
- WordPress Modern Events Calendar <6.1.5 - Blind SQL Injection (nuclei): http/cves/2021/CVE-2021-24946.yaml

## Other vulnerabilities in Unknown Modern Events Calendar Lite

- [CVE-2021-24149](https://insights.sbomify.com/CVE-2021-24149/): Modern Events Calendar Lite < 5.16.6 - Authenticated SQL Injection (high 8.8)
- [CVE-2021-24146](https://insights.sbomify.com/CVE-2021-24146/): Modern Events Calendar Lite < 5.16.5 - Unauthenticated Events Export (high 7.5)
- [CVE-2021-24145](https://insights.sbomify.com/CVE-2021-24145/): Modern Events Calendar Lite < 5.16.5 - Authenticated Arbitrary File Upload leading to RCE (high 7.2)
- [CVE-2021-24925](https://insights.sbomify.com/CVE-2021-24925/): Modern Events Calendar Lite < 6.1.5 - Reflected Cross-Site Scripting (medium 6.1)
- [CVE-2021-4458](https://insights.sbomify.com/CVE-2021-4458/): Modern Events Calendar Lite <= 6.3.0 - Unauthenticated SQL Injection (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24946 and fix it if it is affected.

What it is: CVE-2021-24946 is a critical SQL injection vulnerability in Unknown Modern Events Calendar Lite, published on 13 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-24946 exists.

Affected product: Unknown Modern Events Calendar Lite. 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-2021-24946/ (Markdown: https://insights.sbomify.com/CVE-2021-24946/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24946
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24946
- OSV: https://osv.dev/vulnerability/CVE-2021-24946

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24946/
Summaries are generated and may contain mistakes; the official description above is the record.