CVE-2021-29849Network attack vector

Credential disclosure via embedded Web UI JavaScript

Published Dec 1, 2021 · Updated Sep 17, 2024

Cross-site scripting in IBM QRadar SIEM 7.3 and 7.4 allows remote authenticated users to expose session credentials through the Web UI. The Web UI accepts attacker-supplied JavaScript without neutralizing it and executes the script in another user's trusted session. A low-privileged user must embed the script and another user must view the affected interface; the consequence is limited to credential disclosure and interface alteration.

CVSS severity5.4
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

Cross-site scripting in IBM QRadar SIEM 7.3 and 7.4 allows remote authenticated users to expose session credentials through the Web UI. The Web UI accepts attacker-supplied JavaScript without neutralizing it and executes the script in another user's trusted session. A low-privileged user must embed the script and another user must view the affected interface; the consequence is limited to credential disclosure and interface alteration.

The record

CVE
CVE-2021-29849
Published
Dec 1, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
QRadar SIEM
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=7.3
  2. Affected versionversion=7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · QRadar SIEMversion=7.3; version=7.4

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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