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Fencer Vulns
high 7.2

CVE-2021-24145 in the critical feed json

Modern Events Calendar Lite < 5.16.5 - Authenticated Arbitrary File Upload leading to RCE

published 2021-03-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11059

cvss
7.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
87.2%
EPSS 87.2% chance of exploitation in 30 days, percentile 99.7%
public exploits
2
Metasploit, Exploit-DB, plus a Nuclei check

Summary

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.

Patch / fix

  • webnus modern_events_calendar_lite 5.16.5

Timeline

  1. First public exploit (Metasploit exploit/multi/http/wp_plugin_modern_events_calendar_rce)
  2. Published

Exploit prediction

87.20% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/multi/http/wp_plugin_modern_events_calendar_rce Wordpress Plugin Modern Events Calendar - Authenticated Remote Code Execution metasploit exploit, excellent rank, 2021-01-29
  • EDB-50082 Wordpress Plugin Modern Events Calendar 5.16.2 - Remote Code Execution (Authenticated) webapps, 2021-07-02
  • Nuclei template WordPress Modern Events Calendar Lite <5.16.5 - Authenticated Arbitrary File Upload nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/f42cc26b-9aab-4824-8168-b5b8571d1610 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/163346/WordPress-Modern-Events-Calendar-5.16.2-Shell-Upload.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/163672/WordPress-Modern-Events-Calendar-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Unknown Modern Events Calendar Lite

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.