CVE-2021-20450

Name: CVE-2021-20450
Creator: NVD / NIST
Published: 2024-05-03T17:15:07.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2021-20450 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes to. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

IBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes to. The cookie will be sent to the insecure link and the attacker can then obtain the cookie value by snooping the traffic. IBM X-Force ID: 196640.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.37%

28.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-565

Affected Software

Vendor	Product	Versions
Ibm	Cognos Controller	10.4.1
Ibm	Cognos Controller	10.4.2
Ibm	Cognos Controller	11.0.0

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/196640Vendor Advisory
https://www.ibm.com/support/pages/node/7149876Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/196640Vendor Advisory
https://www.ibm.com/support/pages/node/7149876Vendor Advisory

Timeline

Published: May 3, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-20450?

How severe is CVE-2021-20450?

CVE-2021-20450 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20450?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20450?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST