CVE-2026-106603 WordPress HollerBox plugin <= 2.3.14 - Insecure Direct Object References (IDOR) vulnerability
Attackers can bypass authorization controls in the HollerBox WordPress plugin to access or modify unauthorized data via insecure direct object references.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-106603?
CVE-2026-106603 is a medium-severity missing authorization vulnerability in Groundhogg HollerBox, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Authorization Bypass Through User-Controlled Key vulnerability in Groundhogg HollerBox holler-box allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects HollerBox: from n/a through 2.3.14.
Weakness: CWE-639
Which versions are affected by CVE-2026-106603?
How do I fix CVE-2026-106603?
No fix has been published for CVE-2026-106603 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-106603 being exploited?
There is no known exploitation of CVE-2026-106603 in the wild and no public exploit code.
Sources
Also known as GHSA-q6c9-q8g8-hh32.