CVE-2021-29770Network attack vector

Unauthorized actions via insufficient hyperlink validation

Published Jul 26, 2021 · Updated Sep 16, 2024

Improper input validation in IBM i2 Analyze 4.3.0 through 4.3.2 allows remote authenticated users to trigger actions via malicious links. Certain data fields accept malicious hyperlinks without sufficient validation, and Analyst's Notebook Premium follows them when a user clicks. Exploitation requires authenticated access and user interaction; IBM discloses only that the resulting actions cross an authorization boundary.

CVSS severity4.1
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in IBM i2 Analyze 4.3.0 through 4.3.2 allows remote authenticated users to trigger actions via malicious links. Certain data fields accept malicious hyperlinks without sufficient validation, and Analyst's Notebook Premium follows them when a user clicks. Exploitation requires authenticated access and user interaction; IBM discloses only that the resulting actions cross an authorization boundary.

The record

CVE
CVE-2021-29770
Published
Jul 26, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
i2 Analyze
Classifications
CWE-20, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3.0
  2. Affected versionversion=4.3.1
  3. Affected versionversion=4.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · i2 Analyzeversion=4.3.0; version=4.3.1; version=4.3.2

Published CVSS scores

4.1IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1204.001Malicious 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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