CVE-2026-107903 · Other
NO FIX YET · SEE WHAT TO DO
Gridbox, a Joomla extension from balbooa.com, stores review content without consistent sanitization, so a malicious review can carry script. The script runs in the browser of anyone who views the review, which can lead to session theft or actions taken as that user.
first public Nov 5, 2026 · 1 source
Check it with your coding agent
It checks your repository and tells you if you’re affected, with the fix.
Joomla sites running the Gridbox extension below 2.20.5.0 that display reviews. Sites without Gridbox, or with reviews turned off, are not exposed. Whether attacks need a logged-in account is unknown from the sources.
Not affected if gridbox-not-installed, reviews-disabled
Who cares balbooa, gridbox, joomla, self-hosted
2.20.5.0 are affected; move to 2.20.5.0 or later.Joomla Extension - balbooa.com - Stored XSS in reviews via inconsistent sanitization in Gridbox < 2.20.5.0
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
Are you affected?
Tell InfraStack what you run. It checks this one, and every next one, against your stack.
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.