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CVE-2020-27386

76
FAUCET Score

CVE-2020-27386 is an unrestricted file upload vulnerability in FlexDotnetCMS versions prior to 1.5.9, allowing an authenticated attacker to upload and execute arbitrary code. This high-severity flaw (CVSS 8.8) enables remote code execution with high impact on confidentiality, integrity, and availability, requiring only low privileges and no user interaction. While not listed in CISA KEV, a Metasploit module exists for exploitation, indicating readily available exploit code, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.5.9CPE matchmatch criteria
cpe:2.3:a:flexdotnetcms_project:flexdotnetcms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
72.87%
Probability of exploitation in next 30 days
EPSS Percentile
99.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: FlexDotnetCMS Arbitrary ASP File Upload · Sep 28, 2020
This CVE's current EPSS score of 0.7287 is in the 99th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

packetstormsecurity.com / files/160411/FlexDotnetCMS-1.5.8-Arbitrary-ASP-File-Upload.html
Third Party AdvisoryVDB Entry
blog.vonahi.io / whats-in-a-re-name
ExploitThird Party Advisory
github.com / MacdonaldRobinson/FlexDotnetCMS/releases/tag/v1.5.9
Release NotesThird Party Advisory
github.com / rapid7/metasploit-framework/pull/14339
ExploitPatchThird Party Advisory