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

CVE-2021-27890

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

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

HIGH · CVSS 8.8 EPSS 0.02518
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
▤

Affected Products & Versions

1
mybb< 1.8.26
⚠

Public Exploits & PoCs

3
webappsMyBB 1.8.25 - Chained Remote Command Execution2021-03-22
pocpacketstormsecurity.com · MyBB-1.8.25-Remote-Command-Execution.htmlpacketstormsecurity.com
pocblog.sonarsource.com · mybb-remote-code-execution-chainblog.sonarsource.com
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Mar 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/mybb/mybb/security/advisories/GHSA-r34m-ccm8-mfhqPatchRelease NotesThird Party Advisory
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