How severe is CVE-2021-42171?

CVE-2021-42171 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-2021-42171 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42171?

CVE-2021-42171 affects Tribalsystems Zenario. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42171?

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-2021-42171 published?

CVE-2021-42171 was published on 2022-03-14 and last updated on 2026-06-17.

CVE-2021-42171

CVE-2021-42171 is a high-severity vulnerability in Tribalsystems Zenario 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: 6.5
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Tribalsystems Zenario
Published: 2022-03-14
Last modified: 2026-06-17

Description

Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a web-shell which can run commands, browse system files, browse local resources, attack other servers, and exploit the local vulnerabilities, and so forth.

Frequently asked questions

What is CVE-2021-42171?: Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a web-shell which can run commands, browse system files, browse local resources, attack other servers, and exploit the local vulnerabilities, and so forth.
How severe is CVE-2021-42171?: CVE-2021-42171 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-2021-42171 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42171?: CVE-2021-42171 affects Tribalsystems Zenario. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42171?: 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-2021-42171 published?: CVE-2021-42171 was published on 2022-03-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tribalsystems:zenario:9.0.54156:*:*:*:*:*:*:*

More vulnerabilities in Tribalsystems Zenario

CVE-2022-44136 — Critical (CVSS 9.8): Zenario CMS 9.3.57186 is vulnerable to Remote Code Excution (RCE).
CVE-2021-26830 — Critical (CVSS 9.1): SQL Injection in Tribalsystems Zenario CMS 8.8.52729 allows remote attackers to access the database or delete the…
CVE-2018-18420 — High (CVSS 8.8): Cross-Site Request Forgery (CSRF) vulnerability was discovered in the 8.3 version of Zenario Content Management System…
CVE-2018-5960 — High (CVSS 8.8): Zenario v7.1 - v7.6 has SQL injection via the `Name` input field of organizer.php or admin_boxes.ajax.php in the…
CVE-2022-23043 — High (CVSS 7.2): Zenario CMS 9.2 allows an authenticated admin user to bypass the file upload restriction by creating a new 'File/MIME…
CVE-2023-44769 — Medium (CVSS 5.4): A Cross-Site Scripting (XSS) vulnerability in Zenario CMS v.9.4.59197 allows a local attacker to execute arbitrary code…

All CVEs affecting Tribalsystems Zenario →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

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