# CVE-2021-24149: Modern Events Calendar Lite < 5.16.6 - Authenticated SQL Injection

> Authenticated attackers with author privileges can execute arbitrary SQL commands via the mec[post_id] parameter in the Modern Events Calendar Lite plugin.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/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:** 18 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-5xcq-547q-fvjw

## What is CVE-2021-24149?

CVE-2021-24149 is a high-severity SQL injection vulnerability in Unknown Modern Events Calendar Lite, published on 18 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Unvalidated input in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.6, did not sanitise the mec[post_id] POST parameter in the mec_fes_form AJAX action when logged in as an author+, leading to an authenticated SQL Injection issue.

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

## Which versions are affected by CVE-2021-24149?

It affects 1 product.


Products: Webnus Modern Events Calendar Lite.

## How do I fix CVE-2021-24149?

No fix has been published for CVE-2021-24149 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24149 being exploited?

There is no known exploitation of CVE-2021-24149 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Modern Events Calendar Lite

- [CVE-2021-24946](https://insights.sbomify.com/CVE-2021-24946/): Modern Events Calendar < 6.1.5 - Unauthenticated Blind SQL Injection (critical 9.8)
- [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-2021-24149 and fix it if it is affected.

What it is: CVE-2021-24149 is a high-severity SQL injection vulnerability in Unknown Modern Events Calendar Lite, published on 18 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-24149 in the wild and no public exploit code.

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-2021-24149/ (Markdown: https://insights.sbomify.com/CVE-2021-24149/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24149
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24149
- OSV: https://osv.dev/vulnerability/CVE-2021-24149

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24149/
Summaries are generated and may contain mistakes; the official description above is the record.