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Fencer Vulns
high 8.8

CVE-2021-24160 json

Responsive Menu 4.0.0 - 4.0.3 - Authenticated Arbitrary File Upload

published 2021-04-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11074

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.2%
EPSS 8.2% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

In the Reponsive Menu (free and Pro) WordPress plugins before 4.0.4, subscribers could upload zip archives containing malicious PHP files that would get extracted to the /rmp-menu/ directory. These files could then be accessed via the front end of the site to trigger remote code execution and ultimately allow an attacker to execute commands to further infect a WordPress site.

Patch / fix

  • expresstech responsive_menu 4.0.4

Exploit prediction

8.20% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • wpscan.com https://wpscan.com/vulnerability/066ba5d4-4aaa-4462-b106-500c1f291c37 referenced PoC, tagged "exploit" by a source, unverified
  • wordfence.com https://www.wordfence.com/blog/2021/02/multiple-vulnerabilities-patched-in-responsive-menu-plugin/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/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

  • ExpressTech Responsive Menu – Create Mobile-Friendly Menu
  • ExpressTech Responsive Menu Pro

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.