How severe is CVE-2021-27673?

CVE-2021-27673 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-27673 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27673?

CVE-2021-27673 affects Tribalsystems Zenario. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27673?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27673 published?

CVE-2021-27673 was published on 2021-04-15 and last updated on 2026-06-17.

CVE-2021-27673

CVE-2021-27673 is a medium-severity vulnerability in Tribalsystems Zenario with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Tribalsystems Zenario
Published: 2021-04-15
Last modified: 2026-06-17

Description

Cross Site Scripting (XSS) in the "admin_boxes.ajax.php" component of Tribal Systems Zenario CMS v8.8.52729 allows remote attackers to execute arbitrary code by injecting arbitrary HTML into the "cID" parameter when creating a new HTML component.

Frequently asked questions

What is CVE-2021-27673?: Cross Site Scripting (XSS) in the "admin_boxes.ajax.php" component of Tribal Systems Zenario CMS v8.8.52729 allows remote attackers to execute arbitrary code by injecting arbitrary HTML into the "cID" parameter when creating a new HTML component.
How severe is CVE-2021-27673?: CVE-2021-27673 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-27673 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27673?: CVE-2021-27673 affects Tribalsystems Zenario. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27673?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27673 published?: CVE-2021-27673 was published on 2021-04-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tribalsystems:zenario:8.8.52729:*:*:*:*:*:*:*

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-2021-42171 — High (CVSS 7.2): Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a…
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…

All CVEs affecting Tribalsystems Zenario →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →