{"id":"CVE-2026-21631","aliases":["BIT-joomla-2026-21631","EUVD-2026-17857","GHSA-24p2-2h4q-gmhf"],"status":"published","title":"Joomla! Core - [20260303] - XSS vector in com_associations comparison view","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","severity":{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0022,"percentile":0.12663,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-04-01T09:03:17Z","modified":"2026-10-28T02:31:04Z","fixes":[{"ecosystem":"Bitnami","package":"joomla","fixed_in":["5.4.4","6.0.4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"joomla","ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"fixed":"5.4.4"},{"introduced":"6.0.0"},{"fixed":"6.0.4"}]}]}],"products":[{"vendor":"joomla","product":"joomla\\!"},{"vendor":"joomla! project","product":"joomla! cms"}],"references":[{"url":"https://developer.joomla.org/security-centre/1029-20260303-core-xss-vector-in-com-associations-comparison-view.html","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://github.com/Shirshaw64p/security-advisories/tree/main/CVE-2026-21631","tags":["third-party-advisory","Exploit","Third Party Advisory","advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21631","tags":["web"]},{"url":"https://github.com/advisories/GHSA-24p2-2h4q-gmhf"}],"sources":{"cve":[{"id":"CVE-2026-21631","title":"Joomla! Core - [20260303] - XSS vector in com_associations comparison view","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","status":"published","published":"2026-04-01T09:03:17.208Z","modified":"2026-04-02T05:09:59.076Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:41:42.05254Z"}],"euvd":[{"id":"EUVD-2026-17857","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","status":"published","published":"2026-04-01T09:03:17Z","modified":"2026-04-02T05:09:59Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U","level":"medium"}],"updated_at":"2026-11-02T19:25:23.620594Z"}],"ghsa":[{"id":"GHSA-24p2-2h4q-gmhf","title":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","status":"published","published":"2026-04-01T12:31:28Z","modified":"2026-04-09T21:32:32Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/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:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:07:24.354029Z"}],"nvd":[{"id":"CVE-2026-21631","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","status":"published","published":"2026-04-01T10:16:16.097Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":5.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/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:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:12.73929Z"}],"osv":[{"id":"CVE-2026-21631","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","status":"published","published":"2026-04-01T10:16:16.097Z","modified":"2026-10-28T02:31:04.228244972Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:58.42038Z"},{"id":"BIT-joomla-2026-21631","title":"Joomla! Core - [20260303] - XSS vector in com_associations comparison view","description":"Lack of output escaping leads to a XSS vector in the multilingual associations component.","status":"published","published":"2026-04-10T08:49:17.625Z","modified":"2026-09-08T08:48:02.496118703Z","updated_at":"2026-11-02T15:28:31.782692Z"}]}}