{"id":"CVE-2026-88824","aliases":["EUVD-2026-83507","GHSA-4qrp-9fm8-gvg2"],"status":"published","title":"Master Blocks 1.4.1 - 1.4.1.4 - Unauthenticated Stored XSS via White Label Settings","description":"The Master Blocks  WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00505,"percentile":0.43596,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-09-19T06:00:16Z","modified":"2026-09-21T13:34:57Z","products":[{"vendor":"unknown","product":"master blocks"}],"references":[{"url":"https://wpscan.com/vulnerability/898fda0a-4d27-4def-ae6f-35bf25a8ae8d/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88824"},{"url":"https://wpscan.com/vulnerability/898fda0a-4d27-4def-ae6f-35bf25a8ae8d"},{"url":"https://github.com/advisories/GHSA-4qrp-9fm8-gvg2"}],"sources":{"cve":[{"id":"CVE-2026-88824","title":"Master Blocks 1.4.1 - 1.4.1.4 - Unauthenticated Stored XSS via White Label Settings","description":"The Master Blocks  WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.","status":"published","published":"2026-09-19T06:00:16.738Z","modified":"2026-09-19T13:18:55.698Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:42:04.39372Z"}],"euvd":[{"id":"EUVD-2026-83507","description":"The Master Blocks  WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.","status":"published","published":"2026-09-19T06:00:16Z","modified":"2026-09-19T13:18:55Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:28:06.992666Z"}],"ghsa":[{"id":"GHSA-4qrp-9fm8-gvg2","title":"The Master Blocks  WordPress plugin before 1.5.0 does not have authorisation on one of its REST...","description":"The Master Blocks  WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.","status":"published","published":"2026-09-19T09:32:09Z","modified":"2026-09-19T15:32:24Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:12:13.368323Z"}],"nvd":[{"id":"CVE-2026-88824","description":"The Master Blocks  WordPress plugin before 1.5.0 does not have authorisation on one of its REST routes, allowing unauthenticated users to update its settings, including a value that is output unescaped in the admin area, leading to Stored XSS that executes in the session of any administrator visiting a wp-admin page.","status":"published","published":"2026-09-19T07:16:33.273Z","modified":"2026-09-21T13:34:57.127Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:50.043898Z"}]}}