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TI-2021-09199 Aliases CVE-2021-27821GHSA-4r8j-5v22-gg78

The Web Interface for OpenWRT LuCI version 19.07 and lower has been discovered to have a…

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

The Web Interface for OpenWRT LuCI version 19.07 and lower has been discovered to have a cross-site scripting vulnerability.

Why it matters now

EPSS 0.00591 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openwrt:luci:*:*:*:*:*:*:*:*up to 19.07.0Vulnerableopenwrt
  • cpe:2.3:a:openwrt:luci:*:*:*:*:*:*:*:* Versions up to 19.07.0 Vulnerable ·openwrt

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27821
  2. 2026-10-03 Alias added: GHSA-4r8j-5v22-gg78

References

Other 2

  • TI-2023-09913 LuCI openwrt-22.03 branch git-22.361.69894-438c598 was discovered to contain a reflected… CVSS 3.1MEDIUM 5.4
  • TI-2022-19894 OpenWRT LuCI version git-22.140.66206-02913be was discovered to contain a stored… CVSS 3.1MEDIUM 5.4
  • TI-2019-09158 In OpenWrt LuCI through 0.10, the endpoints admin/status/realtime/bandwidth_status and… CVSS 3.0CRITICAL 9.8
  • TI-2026-25213 LuCI luci-mod-network: Possible XSS attack in WiFi scan on Joining Wireless Client modal CVSS 3.1HIGH 8.6
  • TI-2020-08756 In OpenWrt LuCI git-20.x, remote unauthenticated attackers can retrieve the list of… CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences