CVE-2026-65888 Joomla Extension - balbooa.com - Account takeover vulnerability in Gridbox < 2.20.2

Q: What is CVE-2026-65888?

CVE-2026-65888 is a critical authentication bypass vulnerability in balbooa.com Gridbox extension for Joomla, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-65888 being exploited?

There is no known exploitation of CVE-2026-65888 in the wild and no public exploit code.

Q: How do I fix CVE-2026-65888?

No fix has been published for CVE-2026-65888 yet. Limit exposure of the affected software until one is available.

Critical 10.0 Published 29 Jul 2026 Updated 12 Aug 2026

Attackers can bypass authentication to log in as any user on sites using the Gridbox Joomla extension, leading to account takeover.

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-2026-65888?

CVE-2026-65888 is a critical authentication bypass vulnerability in balbooa.com Gridbox extension for Joomla, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Joomla Extension - balbooa.com - Account takeover vulnerability in Gridbox < 2.20.2 - The socialLogin method allows actors to login as any given user on the target site.

Weakness: CWE-284

Which versions are affected by CVE-2026-65888?

It affects 1 product.

Products include Balbooa Gridbox.

How do I fix CVE-2026-65888?

No fix has been published for CVE-2026-65888 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-65888 being exploited?

There is no known exploitation of CVE-2026-65888 in the wild and no public exploit code.

Sources

Also known as GHSA-84gf-cfmw-8qqq.