VULNERABILITY INTELLIGENCE

CVE-2021-27279

CVSS score5.4 MEDIUM

EPSS probability0.96%

CISA KEVNot currently listed

Published2021-02-22

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Description

MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).

Weakness classification

nvd@nist.gov: CWE-79

Primary references

cve@mitre.org — Patch, Third Party Advisory
cve@mitre.org — Exploit, Third Party Advisory
cve@mitre.org — Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory