{"cve":"CVE-2021-43281","nvd":{"published":"2021-11-04T18:15:08.797","modified":"2026-06-17T04:10:47.013","status":"Modified","description":"MyBB before 1.8.29 allows Remote Code Injection by an admin with the \"Can manage settings?\" permission. The Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type \"php\" with PHP code, executed on Change Settings pages.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2},"cwes":["CWE-94"],"references":["https://github.com/mybb/mybb/security/advisories/GHSA-8gxx-vmr9-h39p","https://github.com/mybb/mybb/security/advisories/GHSA-8gxx-vmr9-h39p"],"products":["mybb:mybb"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-43281","score":0.01335,"percentile":0.71171,"date":"2026-11-01"},"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."]}