How severe is CVE-2021-20391?

CVE-2021-20391 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-20391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20391?

CVE-2021-20391 affects Ibm Qradar User Behavior Analytics. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20391?

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

When was CVE-2021-20391 published?

CVE-2021-20391 was published on 2021-05-14 and last updated on 2026-06-17.

CVE-2021-20391

CVE-2021-20391 is a low-severity vulnerability in Ibm Qradar User Behavior Analytics with a CVSS 3.x base score of 3.3. 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-922.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 2.1
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-922
Affected product: Ibm Qradar User Behavior Analytics
Published: 2021-05-14
Last modified: 2026-06-17

Description

IBM QRadar User Behavior Analytics 1.0.0 through 4.1.0 allows web pages to be stored locally which can be read by another user on the system. IBM X-Force ID: 195999.

Frequently asked questions

What is CVE-2021-20391?: IBM QRadar User Behavior Analytics 1.0.0 through 4.1.0 allows web pages to be stored locally which can be read by another user on the system. IBM X-Force ID: 195999.
How severe is CVE-2021-20391?: CVE-2021-20391 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-20391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20391?: CVE-2021-20391 affects Ibm Qradar User Behavior Analytics. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20391 published?: CVE-2021-20391 was published on 2021-05-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:qradar_user_behavior_analytics:*:*:*:*:*:*:*:*

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