CVE-2026-88853 Cross-site scripting in Modals (Pro) extension for Joomla
A lower-privileged author can inject malicious JavaScript via event handler options, leading to stored XSS and potential privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-88853?
CVE-2026-88853 is a high-severity cross-site scripting vulnerability in regularlabs.com Modals (Pro) extension for Joomla, published on 14 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Joomla Extension - regularlabs.com - Privileged stored XSS via event handler option in Modals Pro extension for Joomla < 17.0.0 - Modals Pro intentionally supports JavaScript Events such as on-open and on-closed. Affected versions do not distinguish trusted extension configuration from event code supplied in ordinary article content. A lower-privileged author can therefore use a documented executable feature which should be reserved for trusted authors.
Weakness: CWE-79
Which versions are affected by CVE-2026-88853?
How do I fix CVE-2026-88853?
No fix has been published for CVE-2026-88853 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-88853 being exploited?
There is no known exploitation of CVE-2026-88853 in the wild and no public exploit code.
Sources
Also known as GHSA-xc7p-wr44-hv2x.