Affected versions: ≥ 5.0.0 and < 5.0.5
Full advisory: regularlabs.com
CVE-2026-85190MediumPublished 13 September 2026
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. As at 13 September 2026 the CVE record(s) for this advisory are RESERVED and not yet published, so no official CVSS score exists yet and the severity recorded here is mySites.guru's own assessment, to be revised when the records go live.
Affected versions: ≥ 5.0.0 and < 5.0.5
Official record: cve.org · NVD
Every connected Joomla site is checked against these rules on each audit, and flagged if it runs an affected version.
Affected extensions and versions
Quick Index - 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. As at 13 September 2026 the CVE record(s) for this advisory are RESERVED and not yet published, so no official CVSS score exists yet and the severity recorded here is mySites.guru's own assessment, to be revised when the records go live.
Affected versions: ≥ 5.0.0 and < 5.0.5
Full advisory: regularlabs.com
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Rules current as of 13 September 2026.