VULNERABILITY INTELLIGENCE
CVE-2026-81766
CVSS score6.6 MEDIUM
EPSS probability0.43%
CISA KEVNot currently listed
Published2026-08-30
Last modified2026-08-31
CVSS vectorCVSS: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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-269