Known vulnerabilities in Twenty Fifteen

1Reported vulnerabilities

6.4Highest CVSS score

4.2Latest version

60,000+Active installs

What to do now

Update Twenty Fifteen to 1.2 or later. 1 of these have a fixed version available. Updating resolves them.

Plugin last updated: May 20, 2026 / Tested up to WordPress: Unknown / 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-2015-3429	Medium 6.4	3.8%	1.1 and earlier	`1.2`	April 8, 2015

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