# CVE-2026-48885: Groundhogg HollerBox unauthenticated XSS

Source: https://junglewise.ai/threats/cve-2026-48885-groundhogg-hollerbox-unauthenticated-xss  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-48885 · Severity: high · CVSS 7.1 · Published 2026-06-15

HollerBox, a WordPress plugin used for lead generation and popups, contains a security flaw that allows unauthorized individuals to inject malicious scripts into the website. If a site administrator or visitor interacts with a specially crafted link or page, the attacker could potentially hijack sessions, redirect users to malicious websites, or deface the site. This could lead to a loss of customer trust and unauthorized access to administrative functions.

Vendors: [Groundhogg](https://junglewise.ai/threats/vendors/groundhogg).

## Quick answers

**Is CVE-2026-48885 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-48885 being exploited in the wild.

**How severe is CVE-2026-48885?** High severity, with a CVSS score of 7.1, published 15 June 2026.

**Which products and versions are affected?** Groundhogg HollerBox <= 2.3.10.1.

**Is there a fix for CVE-2026-48885?** A patch was published on 2026-06-02: Version 2.3.11 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-48885 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-48885?** Check whether you run Groundhogg HollerBox at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Cross-Site Scripting (XSS) vulnerability exists in the HollerBox plugin for WordPress (versions 2.3.10.1 and below) due to improper neutralization of input during web page generation (CWE-79). The flaw allows an unauthenticated remote attacker to inject arbitrary JavaScript or HTML payloads. Exploitation requires a victim (typically a site administrator) to perform an action, such as clicking a malicious link or visiting a crafted page (User Interaction required). Successful exploitation can lead to session hijacking, unauthorized administrative actions, or site defacement. The issue is resolved in version 2.3.11.

## Affected products

- Groundhogg HollerBox <= 2.3.10.1

## Timeline

- 2026-04-19: other: Reported by researcher she11f
- 2026-06-02: advisory: Patchstack advisory published
- 2026-06-15: disclosed: NVD publication date
- 2026-06-02: patched: Version 2.3.11 released

## References

- [https://patchstack.com/database/wordpress/plugin/holler-box/vulnerability/wordpress-hollerbox-plugin-2-3-10-1-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/holler-box/vulnerability/wordpress-hollerbox-plugin-2-3-10-1-cross-site-scripting-xss-vulnerability?_s_id=cve)