CVE-2026-85190CWE-79cross-site-scripting

CVE-2026-85190

published September 14, 2026

CVSS
7.5
EPSS
0%
Percentile
35.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
7.5 · NONE
CVSS v4.0
7.5 · 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
EPSS
0.00418 · 35.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-14T11:17Z
References (1)
https://www.regularlabs.com/ · [email protected]
EPSS history
Timeline
  • 15 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 14 SEP 06:18Z
    Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla < 5.0.5
    cvelistv5