{"id":"CVE-2024-12878","aliases":["EUVD-2025-5312","GHSA-7c47-rxv3-c2fv"],"status":"published","title":"Custom Block Builder – Lazy Blocks \u003c 3.8.3 - Reflected XSS","description":"The Custom Block Builder  WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00617,"percentile":0.49912,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2025-02-26T06:00:07Z","modified":"2026-06-17T07:00:41Z","exploits":[{"source":"nuclei","id":"CVE-2024-12878","title":"Lazy Blocks \u003c= 3.8.2 - Cross-Site Scripting","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-12878.yaml"}],"products":[{"vendor":"thedevoice","product":"lazy_blocks"},{"vendor":"unknown","product":"custom block builder"}],"references":[{"url":"https://wpscan.com/vulnerability/827444d1-87cb-4057-827a-d802eac82cf8/","tags":["exploit","vdb-entry","technical-description","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-12878"},{"url":"https://wpscan.com/vulnerability/827444d1-87cb-4057-827a-d802eac82cf8"},{"url":"https://github.com/advisories/GHSA-7c47-rxv3-c2fv"}],"sources":{"cve":[{"id":"CVE-2024-12878","title":"Custom Block Builder – Lazy Blocks \u003c 3.8.3 - Reflected XSS","description":"The Custom Block Builder  WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.","status":"published","published":"2025-02-26T06:00:07.209Z","modified":"2025-02-26T16:02:27.112Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","level":"high","assessor":"adp"}],"updated_at":"2026-11-02T14:34:12.635756Z"}],"euvd":[{"id":"EUVD-2025-5312","description":"The Custom Block Builder  WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.","status":"published","published":"2025-02-26T06:00:07Z","modified":"2025-02-26T16:02:27Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T20:53:23.257772Z"}],"ghsa":[{"id":"GHSA-7c47-rxv3-c2fv","title":"The Custom Block Builder  WordPress plugin before 3.8.3 does not sanitise and escape a parameter...","description":"The Custom Block Builder  WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.","status":"published","published":"2025-02-26T18:30:38Z","modified":"2025-05-15T21:31:22Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:02:18.914991Z"}],"nvd":[{"id":"CVE-2024-12878","description":"The Custom Block Builder  WordPress plugin before 3.8.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.","status":"published","published":"2025-02-26T13:15:36.61Z","modified":"2026-06-17T07:00:41.18Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:10:44.508862Z"}]}}