---
id: CVE-2026-100751
title: >-
  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
  attribut…
summary: >-
  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
  attribut…
severity: high
cvss: 7.5
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N'
cwe:
  - CWE-79
vendor: regularlabs.com
product: plg_system_advancedmodules
affected:
  - plg_system_advancedmodules 2.3.0-3.1.0
published: '2026-09-28'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T12:17:11.743'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100751'
references:
  - url: 'https://www.regularlabs.com/'
    label: security@joomla.org
tags:
  - nvd
  - cve.org
epss: 0.00304
epssPercentile: 0.2303
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-30T11:35:02.304718Z'
cvssSource: cna
ingestedAt: '2026-09-28T08:05:44.633Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.