CVE-2020-4883Network attack vector

Cross-domain sensitive information disclosure

Published May 5, 2021 · Updated Sep 17, 2024

Information disclosure in IBM QRadar SIEM 7.3 and 7.4 allows remote authenticated users to read sensitive data from other domains. The affected cross-domain handling discloses information belonging to separate domains, but IBM has not published the specific request handler or validation error that causes the leak. Access requires a low-privilege authenticated network session; the documented consequence is confidentiality loss and possible follow-on attacks, without reported integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in IBM QRadar SIEM 7.3 and 7.4 allows remote authenticated users to read sensitive data from other domains. The affected cross-domain handling discloses information belonging to separate domains, but IBM has not published the specific request handler or validation error that causes the leak. Access requires a low-privilege authenticated network session; the documented consequence is confidentiality loss and possible follow-on attacks, without reported integrity or availability impact.

The record

CVE
CVE-2020-4883
Published
May 5, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
QRadar SIEM
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 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

4.0NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.3IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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