What’s Vulnerable › Vulnerabilities

CVE-2020-27385

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-12 · updated 2026-06-17
• Weakness: CWE-22

Description

Incorrect Access Control in the FileEditor (/Admin/Views/FileEditor/) in FlexDotnetCMS before v1.5.11 allows an authenticated remote attacker to read and write to existing files outside the web root. The files can be accessed via directory traversal, i.e., by entering a .. (dot dot) path such as ..\..\..\..\..\<file> in the input field of the FileEditor. In FlexDotnetCMS before v1.5.8, it is also possible to access files by specifying the full path (e.g., C:\<file>). The files can then be edited via the FileEditor.

Affected products

• Flexdotnetcms Project Flexdotnetcms: before 1.5.11 — fixed in 1.5.11

How to fix

Upgrade to a fixed version: Flexdotnetcms Project Flexdotnetcms 1.5.11. Check the vendor advisory for mitigations.

References

• https://blog.vonahi.io/whats-in-a-re-name/
• https://github.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.11
• https://blog.vonahi.io/whats-in-a-re-name/
• https://github.com/MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.11

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