How severe is CVE-2021-20450?

CVE-2021-20450 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-20450 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20450?

CVE-2021-20450 primarily affects Ibm Cognos Controller. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-20450?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2021-20450 have an EU (EUVD) identifier?

Yes. CVE-2021-20450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-7868.

When was CVE-2021-20450 published?

CVE-2021-20450 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2021-20450

CVE-2021-20450 is a medium-severity vulnerability in Ibm Cognos Controller with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-565.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-7868
Weakness: CWE-565
Affected product: Ibm Cognos Controller
Published: 2024-05-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-20450?: 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.
How severe is CVE-2021-20450?: CVE-2021-20450 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-20450 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20450?: CVE-2021-20450 primarily affects Ibm Cognos Controller. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-20450?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-20450 have an EU (EUVD) identifier?: Yes. CVE-2021-20450 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-7868.
When was CVE-2021-20450 published?: CVE-2021-20450 was published on 2024-05-03 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ibm:cognos_controller:10.4.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cognos_controller:10.4.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cognos_controller:11.0.0:*:*:*:*:*:*:*

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