6.6
Medium
CVE-2026-81766 The Really Simple Security WordPress plugin before 9.8.0 does not check that the user is allowed to install Really…
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Really Simple Security 9.8 | earliest → < 9.8.0 | 9.8.0 |
Other CVEs of Really Simple Security
The 4 CVEs of Really Simple Security →
CVE-2026-88798
The Really Simple Security WordPress plugin before 9.8.3 does not validate a client-supplied address value before using…
5.3
Medium
CVE-2026-89080
The Really Simple Security WordPress plugin before 9.8.1 does not prevent an unauthenticated request from resetting…
7.5
High
CVE-2026-8293
The Really Simple Security WordPress plugin before 9.5.10.1 does not enforce the second-factor challenge in two of…
7.5
High