Known vulnerabilities in Schema – All In One Schema Rich Snippets

Improve SEO, elevate rankings and Boost CTR. Supports different types of content and works well with Google, Bing, Yahoo, and Facebook.

2Reported vulnerabilities

6.1Highest CVSS score

1.7.9Latest version

30,000+Active installs

What to do now

Update Schema – All In One Schema Rich Snippets to 1.6.6 or later. 2 of these have a fixed version available. Updating resolves them.

Plugin last updated: August 18, 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-2018-20977	Medium 6.1	0.9%	Before 1.5.0	`1.5.0`	August 21, 2019
CVE-2023-25058	Medium 4.3	0.3%	1.6.5 and earlier	`1.6.6`	February 13, 2023

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