CVE Catalog

CVE-2026-85190

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.25%

16th percentile - higher than 16% of all known CVEs

Summary

Joomla Extension Quick Index (regularlabs.com) versions < 5.0.5 contains a privileged stored XSS vulnerability via the class option. The extension 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.

Risk Assessment

The vulnerability allows a low-privileged author to inject persistent malicious scripts, potentially leading to code execution in other users' browsers. This may result in session theft or account takeover.

Recommendation

Update Quick Index to version 5.0.5 or later. Until then, restrict content author privileges.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS