Vulnerability Details CVE-2021-43281
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 71.5%
CVSS Severity
CVSS v3 Score 7.2
CVSS v2 Score 6.5
Products affected by CVE-2021-43281
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cpe:2.3:a:mybb:mybb:1.2.0
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cpe:2.3:a:mybb:mybb:1.2.1
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cpe:2.3:a:mybb:mybb:1.2.10
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cpe:2.3:a:mybb:mybb:1.2.11
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cpe:2.3:a:mybb:mybb:1.2.12
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cpe:2.3:a:mybb:mybb:1.2.13
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cpe:2.3:a:mybb:mybb:1.2.14
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cpe:2.3:a:mybb:mybb:1.2.2
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cpe:2.3:a:mybb:mybb:1.2.3
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cpe:2.3:a:mybb:mybb:1.2.4
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cpe:2.3:a:mybb:mybb:1.2.5
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cpe:2.3:a:mybb:mybb:1.2.6
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cpe:2.3:a:mybb:mybb:1.2.7
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cpe:2.3:a:mybb:mybb:1.2.8
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cpe:2.3:a:mybb:mybb:1.2.9
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cpe:2.3:a:mybb:mybb:1.4.0
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cpe:2.3:a:mybb:mybb:1.4.1
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cpe:2.3:a:mybb:mybb:1.4.10
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cpe:2.3:a:mybb:mybb:1.4.11
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cpe:2.3:a:mybb:mybb:1.4.12
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cpe:2.3:a:mybb:mybb:1.4.13
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cpe:2.3:a:mybb:mybb:1.4.14
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cpe:2.3:a:mybb:mybb:1.4.15
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cpe:2.3:a:mybb:mybb:1.4.16
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cpe:2.3:a:mybb:mybb:1.4.2
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cpe:2.3:a:mybb:mybb:1.4.3
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cpe:2.3:a:mybb:mybb:1.4.4
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cpe:2.3:a:mybb:mybb:1.4.5
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cpe:2.3:a:mybb:mybb:1.4.6
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cpe:2.3:a:mybb:mybb:1.4.7
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cpe:2.3:a:mybb:mybb:1.4.8
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cpe:2.3:a:mybb:mybb:1.4.9
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cpe:2.3:a:mybb:mybb:1.5.1
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cpe:2.3:a:mybb:mybb:1.5.2
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cpe:2.3:a:mybb:mybb:1.6.0
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cpe:2.3:a:mybb:mybb:1.6.1
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cpe:2.3:a:mybb:mybb:1.6.10
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cpe:2.3:a:mybb:mybb:1.6.11
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cpe:2.3:a:mybb:mybb:1.6.12
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cpe:2.3:a:mybb:mybb:1.6.13
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cpe:2.3:a:mybb:mybb:1.6.14
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cpe:2.3:a:mybb:mybb:1.6.15
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cpe:2.3:a:mybb:mybb:1.6.16
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cpe:2.3:a:mybb:mybb:1.6.17
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cpe:2.3:a:mybb:mybb:1.6.18
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cpe:2.3:a:mybb:mybb:1.6.2
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cpe:2.3:a:mybb:mybb:1.6.3
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cpe:2.3:a:mybb:mybb:1.6.4
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cpe:2.3:a:mybb:mybb:1.6.5
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cpe:2.3:a:mybb:mybb:1.6.6
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cpe:2.3:a:mybb:mybb:1.6.7
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cpe:2.3:a:mybb:mybb:1.6.8
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cpe:2.3:a:mybb:mybb:1.6.9
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cpe:2.3:a:mybb:mybb:1.8.0
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cpe:2.3:a:mybb:mybb:1.8.1
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cpe:2.3:a:mybb:mybb:1.8.10
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cpe:2.3:a:mybb:mybb:1.8.11
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cpe:2.3:a:mybb:mybb:1.8.12
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cpe:2.3:a:mybb:mybb:1.8.13
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cpe:2.3:a:mybb:mybb:1.8.14
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cpe:2.3:a:mybb:mybb:1.8.15
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cpe:2.3:a:mybb:mybb:1.8.16
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cpe:2.3:a:mybb:mybb:1.8.17
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cpe:2.3:a:mybb:mybb:1.8.18
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cpe:2.3:a:mybb:mybb:1.8.19
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cpe:2.3:a:mybb:mybb:1.8.2
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cpe:2.3:a:mybb:mybb:1.8.20
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cpe:2.3:a:mybb:mybb:1.8.21
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cpe:2.3:a:mybb:mybb:1.8.22
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cpe:2.3:a:mybb:mybb:1.8.23
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cpe:2.3:a:mybb:mybb:1.8.24
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cpe:2.3:a:mybb:mybb:1.8.25
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cpe:2.3:a:mybb:mybb:1.8.26
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cpe:2.3:a:mybb:mybb:1.8.27
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cpe:2.3:a:mybb:mybb:1.8.28
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cpe:2.3:a:mybb:mybb:1.8.3
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cpe:2.3:a:mybb:mybb:1.8.4
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cpe:2.3:a:mybb:mybb:1.8.5
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cpe:2.3:a:mybb:mybb:1.8.6
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cpe:2.3:a:mybb:mybb:1.8.7
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cpe:2.3:a:mybb:mybb:1.8.8
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cpe:2.3:a:mybb:mybb:1.8.9