Known vulnerabilities in SiteSEO – SEO Simplified

SiteSEO is an easy, fast and powerful SEO plugin for WordPress. Unlock your Website's potential and Maximize your online visibility with our SiteSEO!

4Reported vulnerabilities

6.4Highest CVSS score

1.4.1Latest version

500,000+Active installs

What to do now

Update SiteSEO – SEO Simplified to 1.3.3 or later. 4 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 14, 2026 / Tested up to WordPress: 7.1 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2025-9277	Medium 6.4	0.2%	0 to 1.2.7 (inclusive)	`1.2.8`	August 26, 2025
CVE-2025-12814	Medium 5.3	0.3%	0 to 1.3.2 (inclusive)	`1.3.3`	November 19, 2025
CVE-2025-13085	Medium 4.3	0.2%	0 to 1.3.2 (inclusive)	`1.3.3`	November 19, 2025
CVE-2025-12367	Medium 4.3	0.2%	0 to 1.3.1 (inclusive)	`1.3.2`	November 1, 2025

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.