CVE-2021-33387
CWE-79Published: February 24, 2023· Updated: Jun 17, 2026
Official Description
Cross Site Scripting Vulnerability in MiniCMS v.1.10 allows attacker to execute arbitrary code via a crafted get request.
Risk Analysis
MiniCMS v1.10 is vulnerable to cross-site scripting that can lead to arbitrary code execution via crafted requests. This critical vulnerability has a CVSS score of 9.6.
No public exploit is known for this vulnerability, and it is not in the KEV catalog.
Upgrade to a version of MiniCMS that addresses the XSS vulnerability and validates all incoming requests.
Technical Analysis
CVE-2021-33387 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.6.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Related CVEs (CWE-79)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-33387 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts