ExpressionEngine before 5.3.2 allows remote attackers to upload and execute arbitrary code in a .php%20 file via Compose Msg, Add attachment, and Save As Draft actions. A user with low privileges (member) is able to upload this. It is possible to bypass the MIME type check and file-extension check while uploading new files. Short aliases are not used for an attachment; instead, direct access is allowed to the uploaded files. It is possible to upload PHP only if one has member access, or registration/forum is enabled and one can create a member with the default group id of 5. To exploit this, one must to be able to send and compose messages (at least).
Published 2020-06-24 15:15:12
Updated 2020-07-02 18:37:08
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Execute code

Products affected by CVE-2020-13443

Exploit prediction scoring system (EPSS) score for CVE-2020-13443

0.46%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 76 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-13443

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.5
MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:P
8.0
6.4
NIST
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2020-13443

References for CVE-2020-13443

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