CVE-2020-13443
8.8 · HIGHOverview
CVE-2020-13443 is a high-severity vulnerability affecting expressionengine expressionengine. It was published on June 24, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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).
Remediation
Check the references section for vendor advisories and patches from expressionengine. Update expressionengine to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| expressionengine | expressionengine | >= 0, < 5.3.2 | Affected |
Frequently Asked Questions
What is CVE-2020-13443?
CVE-2020-13443 is a high-severity vulnerability affecting expressionengine expressionengine. It was published on June 24, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2020-13443?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2020-13443?
Check the references section for vendor advisories and patches from expressionengine. Update expressionengine to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-13443?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-13443 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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