CVE-2026-100751 Cross-site scripting in Tabs & Accordions (Free, Pro) extension for Joomla
Privileged users can inject JavaScript via URL attributes in Tabs & Accordions, leading to stored XSS and potential account takeover.
- 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-2026-100751?
CVE-2026-100751 is a high-severity cross-site scripting vulnerability in regularlabs.com Tabs & Accordions (Free, Pro) extension for Joomla, published on 28 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 data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0 - Tabs & Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code passes that value to window.open() when the item is activated. Affected versions do not reject browser URL schemes which execute JavaScript. Joomla sees ordinary plugin syntax while filtering the authored article; Tabs & Accordions creates the executable browser behavior later while rendering the article.
Weakness: CWE-79
Which versions are affected by CVE-2026-100751?
It affects 1 product.
Products include Regularlabs Tabs \& Accordions.
How do I fix CVE-2026-100751?
No fix has been published for CVE-2026-100751 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-2026-100751 being exploited?
There is no known exploitation of CVE-2026-100751 in the wild and no public exploit code.
Sources
Also known as GHSA-cmhf-vxj4-v56x.