How severe is CVE-2020-17452?

CVE-2020-17452 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-17452 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-17452?

CVE-2020-17452 affects Flatcore. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-17452?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-17452 published?

CVE-2020-17452 was published on 2020-08-09 and last updated on 2026-06-17.

CVE-2020-17452

CVE-2020-17452 is a high-severity vulnerability in Flatcore with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Flatcore
Published: 2020-08-09
Last modified: 2026-06-17

Description

flatCore before 1.5.7 allows upload and execution of a .php file by an admin.

Frequently asked questions

What is CVE-2020-17452?: flatCore before 1.5.7 allows upload and execution of a .php file by an admin.
How severe is CVE-2020-17452?: CVE-2020-17452 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-17452 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-17452?: CVE-2020-17452 affects Flatcore. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-17452?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-17452 published?: CVE-2020-17452 was published on 2020-08-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:flatcore:flatcore:*:*:*:*:*:*:*:*

More vulnerabilities in Flatcore

CVE-2019-13961 — High (CVSS 8.8): A CSRF vulnerability was found in flatCore before 1.5, leading to the upload of arbitrary .php files via…
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CVE-2017-9451 — Medium (CVSS 6.1): Cross site scripting (XSS) vulnerability in pages.edit_form.php in flatCore 1.4.6 allows remote attackers to inject…
CVE-2021-40555 — Medium (CVSS 5.4): Cross site scripting (XSS) vulnerability in flatCore-CMS 2.2.15 allows attackers to execute arbitrary code via…
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