CVE-2020-13443

Public Exploit

Description

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).

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.90% Top 30%
Vendor Advisory expressionengine.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://expressionengine.com/blog vendor advisory
https://gist.github.com/mariuszpoplwski/51604d8a6d7d78fffdf590c25e844e09 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2020-13443?
CVE-2020-13443 has been scored as a high severity vulnerability.
How to fix CVE-2020-13443?
To fix CVE-2020-13443, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-13443 being actively exploited in the wild?
It is possible that CVE-2020-13443 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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