TI-2021-06439 Aliases CVE-2021-24147 GHSA-38c2-7994-ggcm

Modern Events Calendar Lite < 5.16.5 - Authenticated Stored Cross-Site Scripting (XSS)

LOW 26CWE-79Published 2021-03-18 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.

Why it matters now

EPSS 0.00748 55th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed Modern Events Calendar Lite (Unknown): 5.16.5

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unknown	Modern Events Calendar Lite	5.16.5 to before 5.16.5	5.16.5	Patch available	CNA

Modern Events Calendar Lite VendorUnknown Affected 5.16.5 to before 5.16.5 Fixed in 5.16.5 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:webnus:modern_events_calendar_lite::::::wordpress::*	before 5.16.5	Vulnerable	Webnus

cpe:2.3:a:webnus:modern_events_calendar_lite:*:*:*:*:*:wordpress:*:* Versions before 5.16.5 Vulnerable ·Webnus

Remediation

Fix · CNA Modern Events Calendar Lite (Unknown) Fixed in 5.16.5

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2021-03-18
Modern Events Calendar Lite 5.16.5
3 records Highest priority Priority HIGH 1 HIGH, 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2021-06437 Modern Events Calendar Lite < 5.16.5 - Authenticated Arbitrary File Upload leading to RCEPriority HIGH 74
- TI-2021-06438 Modern Events Calendar Lite < 5.16.5 - Unauthenticated Events ExportPriority MEDIUM 57
Show all 3 records →

Timeline

2026-10-02 Threatist record created from CVE-2021-24147
2026-10-03 Alias added: GHSA-38c2-7994-ggcm

References

Exploit 1

https://wpscan.com/vulnerability/0f9ba284-5d7e-4092-8344-c68316b0146f

TI-2021-07225 Modern Events Calendar < 6.1.5 - Unauthenticated Blind SQL Injection CVSS 3.1CRITICAL 9.8
TI-2021-06437 Modern Events Calendar Lite < 5.16.5 - Authenticated Arbitrary File Upload leading to RCE CVSS 3.1HIGH 7.2
TI-2022-00289 Modern Events Calendar Lite < 6.4.0 - Contributor+ Stored Cross Site Scripting CVSS 3.1MEDIUM 5.4
TI-2021-06438 Modern Events Calendar Lite < 5.16.5 - Unauthenticated Events Export CVSS 3.1HIGH 7.5
TI-2023-01324 Modern Events Calendar lite < 6.5.2 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
TI-2024-05057 Modern Events Calendar <= 7.11.0 - Authenticated (Subscriber+) Arbitrary File Upload CVSS 3.1HIGH 8.8

See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences