How severe is CVE-2020-13384?

CVE-2020-13384 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-13384 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13384?

CVE-2020-13384 affects Monstra. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13384?

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-2020-13384 published?

CVE-2020-13384 was published on 2020-05-22 and last updated on 2026-06-17.

CVE-2020-13384

CVE-2020-13384 is a high-severity vulnerability in Monstra with a CVSS 3.x base score of 8.8. 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 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Monstra
Published: 2020-05-22
Last modified: 2026-06-17

Description

Monstra CMS 3.0.4 allows remote authenticated users to upload and execute arbitrary PHP code via admin/index.php?id=filesmanager because, for example, .php filenames are blocked but .php7 filenames are not, a related issue to CVE-2017-18048.

Frequently asked questions

What is CVE-2020-13384?: Monstra CMS 3.0.4 allows remote authenticated users to upload and execute arbitrary PHP code via admin/index.php?id=filesmanager because, for example, .php filenames are blocked but .php7 filenames are not, a related issue to CVE-2017-18048.
How severe is CVE-2020-13384?: CVE-2020-13384 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-13384 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13384?: CVE-2020-13384 affects Monstra. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13384?: 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-2020-13384 published?: CVE-2020-13384 was published on 2020-05-22 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/48479

Affected products (1)

cpe:2.3:a:monstra:monstra:3.0.4:*:*:*:*:*:*:*

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