{"id":"CVE-2021-26030","aliases":["BIT-joomla-2021-26030","EUVD-2021-12853","GHSA-f8r2-5wfg-hq3j"],"status":"published","title":"[20210401] - Core - Escape xss in logo parameter error pages","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.82791,"percentile":0.99675,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-04-14T17:34:57Z","modified":"2026-10-24T10:30:39Z","affected":[{"source":"osv","ecosystem":"Bitnami","package":"joomla","ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.0"},{"last_affected":"3.9.25"}]}]}],"products":[{"vendor":"joomla","product":"joomla\\!"},{"vendor":"joomla! project","product":"joomla! cms"}],"references":[{"url":"https://developer.joomla.org/security-centre/850-20210401-core-escape-xss-in-logo-parameter-error-pages.html","tags":["x_refsource_MISC","vendor-advisory","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26030","tags":["web"]},{"url":"https://github.com/advisories/GHSA-f8r2-5wfg-hq3j"}],"sources":{"cve":[{"id":"CVE-2021-26030","title":"[20210401] - Core - Escape xss in logo parameter error pages","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","status":"published","published":"2021-04-14T17:34:57.954Z","modified":"2026-02-25T05:04:18.089Z","updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-12853","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","status":"published","published":"2021-04-14T17:34:57Z","modified":"2026-02-25T05:04:18Z","updated_at":"2026-11-02T19:48:29.551855Z"}],"ghsa":[{"id":"GHSA-f8r2-5wfg-hq3j","title":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks...","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","status":"published","published":"2022-05-24T17:47:33Z","modified":"2023-01-29T05:06:23Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:00.528527Z"}],"nvd":[{"id":"CVE-2021-26030","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","status":"published","published":"2021-04-14T18:15:14.097Z","modified":"2026-06-17T03:42:46.047Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-26030","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","status":"published","published":"2021-04-14T18:15:14.097Z","modified":"2026-10-24T10:30:39.025890927Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:18.778776Z"},{"id":"BIT-joomla-2021-26030","title":"[20210401] - Core - Escape xss in logo parameter error pages","description":"An issue was discovered in Joomla! 3.0.0 through 3.9.25. Inadequate escaping allowed XSS attacks using the logo parameter of the default templates on error page","status":"published","published":"2025-04-03T14:13:02.387Z","modified":"2026-09-08T08:48:01.391789736Z","updated_at":"2026-11-02T15:28:31.782692Z"}]}}