CVE-2021-20455Network attack vector

Sensitive information disclosure via detailed browser errors

Published Jan 7, 2025 · Updated Jan 7, 2025

Information disclosure in IBM Cognos Controller 11.0.0 through 11.0.1 and IBM Controller 11.1.0 allows remote attackers to obtain error details. IBM has not published the request, endpoint, or application code that emits the detailed technical error message to the browser. No authentication or user interaction is required, but attack complexity is high and the disclosed details support further attacks.

CVSS severity3.7
Low
EPSS probability0.48%
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 Cognos Controller 11.0.0 through 11.0.1 and IBM Controller 11.1.0 allows remote attackers to obtain error details. IBM has not published the request, endpoint, or application code that emits the detailed technical error message to the browser. No authentication or user interaction is required, but attack complexity is high and the disclosed details support further attacks.

The record

CVE
CVE-2021-20455
Published
Jan 7, 2025
Updated
Jan 7, 2025
Vendor
IBM
Product
IBM Controller
Classifications
CWE-209, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 2025Record 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=11.0.0 <=11.0.1
  2. Affected versionversion=11.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Controllerversion=11.0.0 <=11.0.1; version=11.1.0

Published CVSS scores

3.7IBM CorporationCVSS:3.1/AV:N/AC:H/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1190Exploit Public-Facing Application

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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