CVE-2021-29821Network attack vector

Trusted-session credential disclosure via executable Web UI input

Published Sep 20, 2021 · Updated Sep 16, 2024

Cross-site scripting in IBM Tivoli Netcool/OMNIbus WebGUI 8.1.x allows remote authenticated users to disclose trusted-session credentials. The Web UI renders attacker-supplied JavaScript as executable content, but IBM does not identify the affected field, page, or handler. Exploitation requires low-privileged access and a separate user's interaction with the crafted content; impact is limited to altering Web UI behavior and reading data available to that user's session.

CVSS severity5.4
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in IBM Tivoli Netcool/OMNIbus WebGUI 8.1.x allows remote authenticated users to disclose trusted-session credentials. The Web UI renders attacker-supplied JavaScript as executable content, but IBM does not identify the affected field, page, or handler. Exploitation requires low-privileged access and a separate user's interaction with the crafted content; impact is limited to altering Web UI behavior and reading data available to that user's session.

The record

CVE
CVE-2021-29821
Published
Sep 20, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
Tivoli Netcool/OMNIbus
Classifications
T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=8.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Tivoli Netcool/OMNIbusversion=8.1.0

Published CVSS scores

5.4IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1189Drive-by Compromise

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo