CVE-2021-27279 Information

Description

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

CVSS Vector

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

Reference

https://github.com/mybb/mybb/commit/cb781b49116bf5c4d8deca3e17498122b701677a https://github.com/mybb/mybb/security/advisories/GHSA-6483-hcpp-p75w https://mybb.com/versions/1.8.25/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4