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Quick Index security vulnerabilities

mySites.guru tracks 2 vulnerabilities in Quick Index (quickindex), covering 2 CVEs. Every connected Joomla site is checked against them on each audit.

Is my site affected?

Your site is affected if it runs Quick Index in any of these ranges:

  • from 5.0.0 up to but not including 5.0.5
  • up to and including 4.3.6
Latest safe version
5.0.5 or later. No rule we check matches that release or any newer one.
What to do
Update Quick Index to 5.0.5 or later from the vendor, then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
Check whether your sites are affected

Every Quick Index vulnerability we track

Newest first. CVSS is the score published in each CVE record, where it has one; the severity column is the rating our check uses.

CVEAffected versionsFixed inSeverityAdded
CVE-2026-85190CVSS 7.5from 5.0.0 up to but not including 5.0.55.0.5High2026-09-13
CVE-2026-63265CVSS 8.0up to and including 4.3.6after 4.3.6Medium2026-07-22

What we check for

HighCVE-2026-851902026-09-13

Quick Index (quickindex) 5.0.0 to below 5.0.5 - Authenticated Stored XSS via Crafted Index Class Options

Regular Labs Quick Index 5.0.0 through 5.0.4 is affected by CVE-2026-85190, fixed in 5.0.5 (released 13 September 2026). Crafted index class options were not sanitised, allowing JavaScript to be injected into the rendered index. Exploitation requires the ability to author or edit content containing a Quick Index tag, so this is an authenticated stored XSS. Update to 5.0.5 or later. The same release also fixes indexes showing headings from articles the visitor cannot access, an access control defect the vendor did not label a security fix but which discloses restricted article titles to unauthorised visitors. The CVE record was published on 14 September 2026 with a CVSS 4.0 base score of 7.5 (High), vector 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.

Affected versions: ≥ 5.0.0 and < 5.0.5

Full advisory: regularlabs.com

MediumCVE-2026-632652026-07-22

Regular Labs Quick Index (quickindex) <= 4.3.6 - Broken Access Control (Regular Labs AJAX endpoints)

Regular Labs Quick Index up to and including 4.3.6. Privileged Regular Labs AJAX endpoints did not consistently require valid CSRF tokens, matching component/item permissions and trusted server-generated form configuration, so authenticated lower-privileged users, or a CSRF attack, could invoke lookups or mutations outside their authorisation (CVE-2026-63265). Fixed in the Regular Labs security release of 22 July 2026 (5.0.0).

Affected versions: ≤ 4.3.6

Full advisory: our disclosure post

Timeline

  1. 22 July 2026Check added for CVE-2026-63265 (up to and including 4.3.6)
  2. 22 July 2026CVE-2026-63265 record published
  3. 13 September 2026Check added for CVE-2026-85190 (from 5.0.0 up to but not including 5.0.5)
  4. 14 September 2026CVE-2026-85190 record published

References

Each CVE page above links its official cve.org record and its NVD entry.

Quick Index vulnerability questions

Which versions of Quick Index are vulnerable?
mySites.guru tracks 2 vulnerabilities in Quick Index (quickindex). A site is affected if its installed version is in any of these ranges: from 5.0.0 up to but not including 5.0.5; up to and including 4.3.6.
What is the latest safe version of Quick Index?
5.0.5. Every vulnerability tracked here is fixed by 5.0.5, and no rule we check matches that release or any later one.
How do I check which version of Quick Index my Joomla site runs?
The installed version is listed on the Joomla administrator's Extensions: Manage screen; search it for quickindex. mySites.guru reads the installed version on every audit of a connected site and checks it against these rules.

Running Quick Index on a site you manage?

A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, fix.mysites.guru is a single fixed fee per incident, usually resolved the same day.

This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.

CVE identifiers: CVE-2026-85190, CVE-2026-63265. Rules current as of 13 October 2026.