Known vulnerabilities in RTL Tester

Test your themes and plugins in RTL mode.

1Reported vulnerabilities

4.3Highest CVSS score

1.2Latest version

1,000+Active installs

What to do now

Update RTL Tester to 1.2 or later. Some of these have no published fix. Update to the latest version and check the vendor advisory.

Plugin last updated: August 11, 2020 / Tested up to WordPress: 5.5.20 / View on wordpress.org

This plugin has not been updated in over two years. New vulnerabilities may never be fixed. Consider an alternative.

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-2025-64239	Medium 4.3	0.1%	1.2 and earlier	—	December 11, 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.