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CVE-2026-81766

MEDIUM 6.6 CVSS 3.1
Published
August 30, 2026
Last modified
August 31, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-269
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Description

The Really Simple Security WordPress plugin before 9.8.0 does not check that the user is allowed to install Really Simple Security WordPress plugin before 9.8.0 before installing one from a user-supplied URL, allowing an administrator of a subsite on a multisite network to install and execute arbitrary code in the network-shared Really Simple Security WordPress plugin before 9.8.0 directory, which WordPress otherwise reserves to the network administrator. Exploitation requires the network administrator to have enabled the Really Simple Security WordPress plugin before 9.8.0 administration menu for subsites, which is not the default.

Affected WordPress components

  • Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) Plugin · really-simple-ssl
    Confirmed match Active
    Before 9.8.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown Really Simple Security — Before 9.8.0

References

  • wpscan.com https://wpscan.com/vulnerability/948d70a2-605e-4a83-8feb-eca4dbb5f948/
  • nvd.nist.gov Official NVD record