CVE-2021-27890

HIGH

MyBB <1.8.26 - SQL Injection

Title source: llm

Description

SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files.

Exploits (2)

nomisec WORKING POC 10 stars
by xiaopan233 · poc
https://github.com/xiaopan233/Mybb-XSS_SQL_RCE-POC
exploitdb WORKING POC
by SivertPL · javascriptwebappsphp
https://www.exploit-db.com/exploits/49696

References (3)

Scores

CVSS v3 8.8
EPSS 0.0238
EPSS Percentile 84.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Classification

CWE
CWE-89
Status published

Affected Products (1)

mybb/mybb < 1.8.26

Timeline

Published Mar 15, 2021
Tracked Since Feb 18, 2026