HollerBox — Fast & Effective Popups & Lead-Generation vulnerabilities
Plugin slug holler-box · 4 known vulnerabilities · latest disclosed 2026-10-08 · WordPress.org page
Every listed vulnerability has a fix. Version 2.3.15 or later is not affected by any of them. If your site runs an older version, update it.
1 of 4 rated high or critical (CVSS 7 or more).
Known vulnerabilities in HollerBox — Fast & Effective Popups & Lead-Generation
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 5.3 | <= 2.3.14 | 2.3.15 | CVE-2026-106603 | 2026-10-08 | Advisory |
| High 7.2 | <= 2.3.10.1 | 2.3.11 | CVE-2026-48885 | 2026-06-02 | Advisory |
| Medium 4.4 | <= 2.3.2 | 2.3.3 | CVE-2023-41657 | 2023-09-01 | Advisory |
| Medium 6.6 | < 2.1.4 | 2.1.4 | CVE-2023-2111 | 2023-05-02 | Advisory |
Check if a site is affected
Enter a site address to see which version of HollerBox — Fast & Effective Popups & Lead-Generation and other plugins it runs, and whether they match a known vulnerability.
Questions
Is the HollerBox — Fast & Effective Popups & Lead-Generation plugin safe to use?
All 4 known issues are fixed in current versions (2.3.15 or later). Keeping it updated is what matters.
How do I check which version of HollerBox — Fast & Effective Popups & Lead-Generation 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.