Known vulnerabilities in WebP Express

Serve autogenerated WebP images instead of jpeg/png to browsers that supports WebP.

3Reported vulnerabilities

7.5Highest CVSS score

0.25.15Latest version

300,000+Active installs

What to do now

Update WebP Express to 0.25.11 or later. 3 of these have a fixed version available. Updating resolves them.

Plugin last updated: June 19, 2026 / Tested up to WordPress: 6.9.7 / 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-2019-15837	Medium 5.4	0.8%	Before 0.14.8	`0.14.8`	August 30, 2019
CVE-2019-15330	High 7.5	1.8%	Before 0.14.11	`0.14.11`	August 22, 2019
CVE-2025-11379	Medium 5.3	0.3%	0 to 0.25.9 (inclusive)	`0.25.11`	December 4, 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.