PT-2021-17649 · Mybb · Mybb

Vz · Published 2021-03-15 · Updated 2024-03-06 · CVE-2021-27890

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: MyBB versions prior to 1.8.26

Description: The issue is related to SQL Injection vulnerability in MyBB, which occurs via theme properties included in theme XML files.

Recommendations: For versions prior to 1.8.26, update to version 1.8.26 or later to resolve the issue.

Exploit

Fix

SQL injection

Weakness Enumeration

CWE-89

Related Identifiers

BIT-MYBB-2021-27890

CVE-2021-27890

GHSA-R34M-CCM8-MFHQ

Affected Products

Mybb

References · 13

• 🔥 https://github.com/xiaopan233/Mybb-XSS_SQL_RCE-POC · Exploit
• 🔥 https://blog.sonarsource.com/mybb-remote-code-execution-chain · Exploit
• 🔥 https://exploit-db.com/exploits/49696 · Exploit
• https://github.com/mybb/mybb/security/advisories/GHSA-r34m-ccm8-mfhq · Patch
• https://osv.dev/vulnerability/BIT-mybb-2021-27890 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-27890 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27890 · Security Note
• http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.html · Note
• https://t.me/rnetsec/14626 · Telegram Post
• https://t.me/cybersecuritytechnologies/2955 · Telegram Post
• https://t.me/cvenotify/11716 · Telegram Post
• https://t.me/defcon_news/71713 · Telegram Post
• https://t.me/ptswarm/62 · Telegram Post