CVE-2021-41866

medium

Description

MyBB before 1.8.28 allows stored XSS because the displayed Template Name value in the Admin CP's theme management is not escaped properly.

References

Advisories

https://github.com/mybb/mybb/security/advisories/GHSA-gxhv-r3m5-6qv7

https://github.com/mybb/mybb/security/advisories/

Details

Source: Mitre, NVD

Published: 2021-10-26

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 5.4

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

Severity: Medium

EPSS

EPSS: 0.00267