{"cve":"CVE-2019-12830","nvd":{"published":"2019-06-15T18:29:00.220","modified":"2026-06-17T02:15:34.683","status":"Modified","description":"In MyBB before 1.8.21, an attacker can exploit a parsing flaw in the Private Message / Post renderer that leads to [video] BBCode persistent XSS to take over any forum account, aka a nested video MyCode issue.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N","score":8.7},"cwes":["CWE-79"],"references":["https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-release/","https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/","https://blog.mybb.com/2019/06/10/mybb-1-8-21-released-security-maintenance-release/","https://blog.ripstech.com/2019/mybb-stored-xss-to-rce/"],"products":["mybb:mybb"],"source":"nvd","synced_at":"2026-10-19T20:57:00.690689396+00:00"},"epss":{"cve":"CVE-2019-12830","score":0.00964,"percentile":0.61696,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}