CVE-2021-27279

MEDIUM

MyBB < 1.8.25 - Stored Cross-Site Scripting via Nested Email MyCode Tags

Title source: llm
STIX 2.1

Description

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

References (3)

Core 3
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://mybb.com/versions/1.8.25/
Exploit, Third Party Advisory x_refsource_confirm
https://github.com/mybb/mybb/security/advisories/GHSA-6483-hcpp-p75w

Scores

CVSS v3 5.4
EPSS 0.0096
EPSS Percentile 57.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
mybb/mybb < 1.8.25
Published Feb 22, 2021
Tracked Since Feb 18, 2026