CVE-2021-20556 — MEDIUM (5.3)

Vulnerability Description

IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 could allow a remote user to enumerate usernames due to differentiating error messages on existing usernames. IBM X-Force ID: 199181.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Ibm	Cognos Controller	10.4.1

Related Weaknesses (CWE)

CWE-203 CWE-204

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/199181Vendor Advisory
https://www.ibm.com/support/pages/node/7149876Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/199181Vendor Advisory
https://www.ibm.com/support/pages/node/7149876Vendor Advisory

FAQ

What is CVE-2021-20556?

CVE-2021-20556 is a vulnerability with a CVSS score of 5.3 (MEDIUM). IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 could allow a remote user to enumerate usernames due to differentiating error messages on existing usernames. IBM X-Force ID: 199181.

How severe is CVE-2021-20556?

CVE-2021-20556 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-20556?

Check the references section above for vendor advisories and patch information. Affected products include: Ibm Cognos Controller.