{"id":"CVE-2026-85190","aliases":["EUVD-2026-77314","GHSA-2722-5gxq-8j64"],"status":"published","title":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 5.0.5","description":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 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.","severity":{"version":"4.0","score":7.5,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00418,"percentile":0.36552,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-09-14T06:18:26Z","modified":"2026-09-16T19:28:06Z","products":[{"vendor":"regularlabs.com","product":"quick index (free, pro) extension for joomla"}],"references":[{"url":"https://www.regularlabs.com/","tags":["product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85190"},{"url":"https://www.regularlabs.com"},{"url":"https://github.com/advisories/GHSA-2722-5gxq-8j64"}],"sources":{"cve":[{"id":"CVE-2026-85190","title":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 5.0.5","description":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 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.","status":"published","published":"2026-09-14T06:18:26.063Z","modified":"2026-09-15T04:46:08.478Z","cvss":[{"version":"4.0","score":7.5,"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","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:19:52.410665Z"}],"euvd":[{"id":"EUVD-2026-77314","description":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 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.","status":"published","published":"2026-09-14T06:18:26Z","modified":"2026-09-15T04:46:08Z","cvss":[{"version":"4.0","score":7.5,"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","level":"high"}],"updated_at":"2026-11-02T17:28:19.01786Z"}],"ghsa":[{"id":"GHSA-2722-5gxq-8j64","title":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index...","description":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 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.","status":"published","published":"2026-09-14T09:31:02Z","modified":"2026-09-14T09:31:10Z","cvss":[{"version":"4.0","score":7.5,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:11:48.80782Z"}],"nvd":[{"id":"CVE-2026-85190","description":"Joomla Extension - regularlabs.com - Privileged stored XSS via class option in Quick Index extension for Joomla \u003c 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.","status":"published","published":"2026-09-14T07:17:22.49Z","modified":"2026-09-16T19:28:06.713Z","cvss":[{"version":"4.0","score":7.5,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:46.980627Z"}]}}