Which products and versions are affected by CVE-2021-24145?

Affected: Modern Events Calendar Lite (Webnus) versions >= 5.16.5. The full list is in the CVE brief.

Is CVE-2021-24145 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-24145 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-24145?

Public exploit code is available.

Is there a fix for CVE-2021-24145?

Fixed versions are available, including Modern Events Calendar Lite 5.16.5.

How urgently should CVE-2021-24145 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2021-24145

HighPublic exploit

Modern Events Calendar Lite <= 5.16.4 - Authenticated Arbitrary File Upload leading to Remote Code Execution

Published Jul 5, 2021 · Updated Jul 9, 2026 · Also known as TR-21-0544, b9e67e3e-188c-4ca9-b846-d318859aeaf8

Key Facts

Patch immediately

CVE-2021-24145 is a high-severity vulnerability (CVSS 7.2 v3.1) affecting Modern Events Calendar Lite (Webnus).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 87% probability of exploitation in the next 30 days.
Fixed versions are available, including Modern Events Calendar Lite 5.16.5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

7.2

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

87%

Higher than 99.7% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2021-24145 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Arbitrary file upload in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not properly check the imported file, allowing PHP ones to be uploaded by administrator by using the 'text/csv' content-type in the request.

Affected Products

3 affected entries in total

Product	Affected versions	Fixed in
Modern Events Calendar LiteWebnus	>= 5.16.5	5.16.5

Patched Releases

Modern Events Calendar Lite

5.16.5

Timeline

Publicly disclosed
Jul 5, 2021
Last updated
Jul 9, 2026

Weakness Type

CWE-434 Unrestricted Upload of File with Dangerous Type

References

15 more references in the full CVE brief

FAQ

Common Questions.

Arbitrary file upload in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not properly check the imported file, allowing PHP ones to be uploaded by administrator by using the 'text/csv' content-type in the request.
Affected: Modern Events Calendar Lite (Webnus) versions >= 5.16.5. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Modern Events Calendar Lite 5.16.5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2021-24145 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.