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Really Simple Security CVE-2026-81766

| EUVDEUVD-2026-68160
2026-08-30 WPScan GHSA-c5mg-rwrq-r34j

Lifecycle Timeline

2
Patch available
Aug 30, 2026 - 08:01 EUVD
CVE Published
Aug 30, 2026 - 06:00 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

Analysis

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.

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CVE-2026-81766 vulnerability details – vuln.today

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