CVE-2021-27673 reflected XSS in tribalsystems/zenario

What is CVE-2021-27673?

CVE-2021-27673 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Apr 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2021-27673?

2 open source packages ship an affected version, including tribalsystems/zenario. It affects 1 product.

Products include Tribalsystems Zenario.

How do I fix CVE-2021-27673?

Upgrade tribalsystems/zenario to 8.8.53370 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-27673 being exploited?

There is no known exploitation of CVE-2021-27673 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2022-44136 Zenario CMS is vulnerable to Remote Code Execution (RCE). Critical 9.8
• CVE-2021-26830 SQL Injection in tribalsystems/zenario Critical 9.1
• CVE-2018-18420 Zenario CMS vulnerable to CSRF High 8.8
• CVE-2018-5960 SQL Injection in Zenario 7.1-7.6 High 8.8
• CVE-2021-42171 Unrestricted Upload of File with Dangerous Type in Zenario CMS High 7.2

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-8hcm-jj4x-4gmr.