CVE-2021-3109Network attack vector

Administrator-driven browser redirection via custom menu links

Published Mar 26, 2021 · Updated Aug 3, 2024

Open redirect and reverse tabnabbing in SolarWinds Orion Platform before 2020.2.5 allow remote authenticated users to redirect browser tabs. SolarWinds identifies the custom menu item options page as the locus but has not published which URL-validation or link-isolation control is missing. An Orion administrator account and user interaction are required; exploitation can replace the opener page or redirect a browser to an attacker-chosen site.

CVSS severity4.8
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect and reverse tabnabbing in SolarWinds Orion Platform before 2020.2.5 allow remote authenticated users to redirect browser tabs. SolarWinds identifies the custom menu item options page as the locus but has not published which URL-validation or link-isolation control is missing. An Orion administrator account and user interaction are required; exploitation can replace the opener page or redirect a browser to an attacker-chosen site.

The record

CVE
CVE-2021-3109
Published
Mar 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1204.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.3SolarWindsCVSS:3.0/AV:A/AC:L/PR:H/UI:R/S:C/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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