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Status published
Medium
CVE-2025-66121
WordPress SiteGround Security plugin <= 1.5.8 - Broken Access Control vulnerability
Vulnerability Description
Missing Authorization vulnerability in SiteGround SiteGround Security sg-security allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects SiteGround Security: from n/a through <= 1.5.8.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Legion Hunter | Patchstack Bug Bounty Program
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Affected Vendor
SiteGround
View all reports →Affected Software
SiteGround Security
Vulnerable Versions:
0
Timeline
Official Publish:
December 16th, 2025
Last Modified:
April 28th, 2026
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L