TI-2020-02889 Aliases CVE-2020-3337 GHSA-hf79-5ffr-p77w

Cisco Umbrella Open Redirect Vulnerability

LOW 29CWE-601Published 2020-06-18 · Updated 2024-11-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Spoofing
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-601.

Summary

A vulnerability in the web server of Cisco Umbrella could allow an unauthenticated, remote attacker to redirect a user to an undesired web page. The vulnerability is due to improper input validation of the URL parameters in an HTTP request that is sent to an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request that could cause the web application to redirect the request to a specified malicious URL. A successful exploit could allow the attacker to redirect a user to a malicious website.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00815 57th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Umbrella	all versions	—	No fix listed	CNA

Cisco Umbrella VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:umbrella::::::::	all versions	Vulnerable	Cisco

cpe:2.3:a:cisco:umbrella:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-3337
2026-10-03 Alias added: GHSA-hf79-5ffr-p77w

References

Advisory 1

20200617 Cisco Umbrella Open Redirect Vulnerability

TI-2019-01430 Cisco Umbrella Dashboard Session Management Vulnerability CVSS 3.0HIGH 8.8
TI-2018-00394 Cisco Umbrella API Unauthorized Access Vulnerability CVSS 3.0CRITICAL 9.1
TI-2021-01201 Cisco Umbrella Link and CSV Formula Injection Vulnerabilities CVSS 3.1HIGH 8.6
TI-2021-01077 Cisco Umbrella Dashboard Packet Flood Vulnerability CVSS 3.1MEDIUM 5.3
TI-2021-01202 Cisco Umbrella Link and CSV Formula Injection Vulnerabilities CVSS 3.1MEDIUM 6.5
TI-2019-01417 Cisco Umbrella Cross-Site Scripting Vulnerability CVSS 3.1MEDIUM 6.1

See all 9 →

Sources

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