CVE-2021-43281

CVSS V2 Medium 6.5 CVSS V3 High 7.2

Description

MyBB before 1.8.29 allows Remote Code Injection by an admin with the "Can manage settings?" permission. The Admin CP's Settings management module does not validate setting types correctly on insertion and update, making it possible to add settings of supported type "php" with PHP code, executed on Change Settings pages.

Overview

CVE ID
CVE-2021-43281

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2021-11-04T18:15:08

Last Modified Date
2021-11-05T19:10:15

Weakness Enumerations

CWE	URL
CWE-94	http://cwe.mitre.org/data/definitions/94.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:mybb:mybb::::::::	1	OR	1.2.0	1.8.29

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:S/C:P/I:P/A:P

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
SINGLE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
6.5

Severity
MEDIUM

Exploitability Score
8

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
HIGH

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
7.2

Base Severity
HIGH

Exploitability Score
1.2

Impact Score
5.9

References

Reference URL	Reference Tags
https://github.com/mybb/mybb/security/advisories/GHSA-8gxx-vmr9-h39p	Patch Release Notes Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-43281
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43281

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:48:10				Added to TrackCVE
2022-12-05 13:52:24	2021-11-04T18:15Z	2021-11-04T18:15:08	CVE Published Date	updated
2022-12-05 13:52:24		2021-11-05T19:10:15	CVE Modified Date	updated
2022-12-05 13:52:24		Analyzed	Vulnerability Status	updated