Is CVE-2021-27821 actively exploited?

CVE-2021-27821 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-27821?

CVE-2021-27821 has a CVSS score of 6.1 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2021-27821?

Patch guidance is available from openwrt security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-27821.

CVE-2021-27821 - remediation guidance & executive summary

Description

The Web Interface for OpenWRT LuCI version 19.07 and lower has been discovered to have a cross-site scripting vulnerability which can lead to attackers carrying out arbitrary code execution.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: OPENWRT
Published: 5/25/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

openwrt : luci

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-27821. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-27821

View on NIST NVD

CVE-2021-27821 vulnerability