CVE-2021-39608

Flatcore Cms vulnerability

CVSS

7.2

EPSS

45.9%

EPSS pct

99th

Exploited

No known

Remote Code Execution (RCE) vulnerabilty exists in FlatCore-CMS 2.0.7 via the upload addon plugin, which could let a remote malicious user exeuct arbitrary php code.

Affected vendor

Flatcore

Affected product

Flatcore Cms

CVSS vector

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

Weakness type (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Published

2021-08-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring high privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 45.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2021-39608

Confirm whether Flatcore Flatcore Cms is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-39608.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-39608

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-39608 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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