{"id":"CVE-2026-16558","aliases":["EUVD-2026-54733","GHSA-p3q7-6w8f-v63h"],"status":"published","title":"YMC Filter \u003c 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema","description":"The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.","severity":{"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":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00226,"percentile":0.13364,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-08-08T06:00:11Z","modified":"2026-08-26T16:31:16Z","products":[{"vendor":"unknown","product":"ymc filter"},{"vendor":"wssoffice21","product":"ymc filter"}],"references":[{"url":"https://wpscan.com/vulnerability/06ba0551-deab-41fb-b501-eef0727b431a/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16558"},{"url":"https://wpscan.com/vulnerability/06ba0551-deab-41fb-b501-eef0727b431a"},{"url":"https://github.com/advisories/GHSA-p3q7-6w8f-v63h"}],"sources":{"cve":[{"id":"CVE-2026-16558","title":"YMC Filter \u003c 3.12.8 - Contributor+ Stored XSS via Layout Builder Schema","description":"The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.","status":"published","published":"2026-08-08T06:00:11.244Z","modified":"2026-08-10T19:45:58.875Z","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","assessor":"adp"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:20:10.870108Z"}],"euvd":[{"id":"EUVD-2026-54733","description":"The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.","status":"published","published":"2026-08-08T06:00:11Z","modified":"2026-08-10T19:45:58Z","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":"2026-11-02T18:02:01.104981Z"}],"ghsa":[{"id":"GHSA-p3q7-6w8f-v63h","title":"The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder...","description":"The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.","status":"published","published":"2026-08-08T09:30:21Z","modified":"2026-08-10T21:31:59Z","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"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:10:15.841734Z"}],"nvd":[{"id":"CVE-2026-16558","description":"The YMC Filter WordPress plugin before 3.12.8 does not sanitize and escape a layout builder setting before outputting it on a public endpoint, and does not verify object ownership when the setting is saved, allowing users with the Contributor role and above to store JavaScript that executes in the browser of any visitor viewing an affected filter.","status":"published","published":"2026-08-08T07:17:10.13Z","modified":"2026-08-26T16:31:16.753Z","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","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:35.743275Z"}]}}