CVE-2026-85190
High
Description
Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla < 5.0.5 - Quick Index inserts configurable class values into generated HTML without escaping them for an HTML attribute. A crafted value can close the intended class attribute and introduce a new attribute. Joomla's content filter cannot reliably prevent this because Quick Index creates the executable HTML after the authored plugin syntax was filtered.
SeverityHigh
CVSS7.5
Exploit probability—
ProductQuick Index (Free, Pro) extension for Joomla
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| regularlabs.com Quick Index (Free, Pro) extension for Joomla | 1.0.0-5.0.4 | — |
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