CVE-2020-27385: Incorrect Access Control in the FileEditor (/Admin/Views/FileEditor/) in FlexDotnetCMS before v1.5.11 allows a

Q: How do I fix CVE-2020-27385?

flexdotnetcms: upgrade to 1.5.11. Exact commands for each OS are on this page.

Q: Is CVE-2020-27385 being exploited?

CVE-2020-27385 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-27385 affect?

CVE-2020-27385 affects flexdotnetcms. Severity is high (CVSS 8.1). 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

Q: How urgent is CVE-2020-27385?

Priority 53/100. High severity; Public exploit reference

This month

HIGH 8.1UPGRADE

CVE-2020-27385 is a high-severity flaw (CVSS 8.1) affecting flexdotnetcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 pa

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-22
Published	2020-11-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: flexdotnetcms project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-12 19:15 UTCPublished CVE record published
2026-06-17 03:09 UTCUpdated Record last modified

flexdotnetcms project flexdotnetcms UPGRADE

Affected: < 1.5.11

Fixed in: 1.5.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flexdotnetcms || rpm -q flexdotnetcms || flexdotnetcms --version

2. UPGRADE to 1.5.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flexdotnetcms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flexdotnetcms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-27385?

flexdotnetcms: upgrade to 1.5.11. Exact commands for each OS are on this page.

Is CVE-2020-27385 being exploited?

CVE-2020-27385 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-27385 affect?

CVE-2020-27385 affects flexdotnetcms. Severity is high (CVSS 8.1). 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

How urgent is CVE-2020-27385?

Priority 53/100. High severity; Public exploit reference

Related CVEs

CVE-2020-27386 HIGH 8.8 UPGRADE An unrestricted file upload issue in FlexDotnetCMS before v1.5.9 allows an authenticated remote attacker to up

References

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