Vulnerability 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).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Expressionengine | Expressionengine | < 5.3.2 |
Related Weaknesses (CWE)
References
- https://expressionengine.com/blogVendor Advisory
- https://gist.github.com/mariuszpoplwski/51604d8a6d7d78fffdf590c25e844e09ExploitThird Party Advisory
- https://expressionengine.com/blogVendor Advisory
- https://gist.github.com/mariuszpoplwski/51604d8a6d7d78fffdf590c25e844e09ExploitThird Party Advisory
FAQ
What is CVE-2020-13443?
CVE-2020-13443 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 (mem...
How severe is CVE-2020-13443?
CVE-2020-13443 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-13443?
Check the references section above for vendor advisories and patch information. Affected products include: Expressionengine Expressionengine.