CVE-2020-5239
8.7 · HIGHOverview
CVE-2020-5239 is a high-severity vulnerability affecting mailu mailu. It was published on February 13, 2020 and has a CVSS 3.1 base score of 8.7 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
In Mailu before version 1.7, an authenticated user can exploit a vulnerability in Mailu fetchmail script and gain full access to a Mailu instance. Mailu servers that have open registration or untrusted users are most impacted. The master and 1.7 branches are patched on our git repository. All Docker images published on docker.io/mailu for tags 1.5, 1.6, 1.7 and master are patched. For detailed instructions about patching and securing the server afterwards, see https://github.com/Mailu/Mailu/issues/1354
Remediation
Check the references section for vendor advisories and patches from mailu. Update mailu 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 |
|---|---|---|---|
| mailu | mailu | >= 0, < 1.7 | Affected |
Frequently Asked Questions
What is CVE-2020-5239?
CVE-2020-5239 is a high-severity vulnerability affecting mailu mailu. It was published on February 13, 2020 and has a CVSS 3.1 base score of 8.7 (HIGH).
How severe is CVE-2020-5239?
This vulnerability has a CVSS 3.1 base score of 8.7, 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-2020-5239?
Check the references section for vendor advisories and patches from mailu. Update mailu 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-2020-5239?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-5239 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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