JCH Optimize vulnerabilities
Plugin slug jch-optimize · 6 known vulnerabilities · latest disclosed 2026-09-07 · WordPress.org page
Every listed vulnerability has a fix. Version 6.0.1 or later is not affected by any of them. If your site runs an older version, update it.
0 of 6 rated high or critical (CVSS 7 or more).
Known vulnerabilities in JCH Optimize
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 6.4 | < 6.0.1 | 6.0.1 | CVE-2026-84934 | 2026-09-07 | Advisory |
| Medium 4.9 | 4.2.1 to 5.0.0 | 5.0.1 | CVE-2025-15693 | 2026-09-05 | Advisory |
| Medium 4.3 | <= 4.2.0 | 4.2.1 | CVE-2024-34808 | 2024-05-13 | Advisory |
| Medium 4.3 | <= 4.0.0 | 4.0.1 | CVE-2024-30481 | 2024-03-28 | Advisory |
| Medium 4.3 | < 4.0.1 | 4.0.1 | none | 2023-08-08 | Advisory |
| Medium 4.4 | <= 3.2.2 | 3.2.3 | CVE-2023-25491 | 2023-03-02 | Advisory |
Check if a site is affected
Enter a site address to see which version of JCH Optimize and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the JCH Optimize plugin safe to use?
All 6 known issues are fixed in current versions (6.0.1 or later). Keeping it updated is what matters.
How do I check which version of JCH Optimize my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.