How severe is CVE-2021-45457?

CVE-2021-45457 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-45457 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45457?

CVE-2021-45457 primarily affects Apache Kylin. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-45457?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-45457 published?

CVE-2021-45457 was published on 2022-01-06 and last updated on 2026-06-17.

CVE-2021-45457

CVE-2021-45457 is a high-severity vulnerability in Apache Kylin with a CVSS 3.x base score of 7.5. 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Apache Kylin
Published: 2022-01-06
Last modified: 2026-06-17

Description

In Apache Kylin, Cross-origin requests with credentials are allowed to be sent from any origin. This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.

Frequently asked questions

What is CVE-2021-45457?: In Apache Kylin, Cross-origin requests with credentials are allowed to be sent from any origin. This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.
How severe is CVE-2021-45457?: CVE-2021-45457 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-45457 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45457?: CVE-2021-45457 primarily affects Apache Kylin. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-45457?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-45457 published?: CVE-2021-45457 was published on 2022-01-06 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:kylin:4.0.0:-:*:*:*:*:*:*
cpe:2.3:a:apache:kylin:4.0.0:alpha:*:*:*:*:*:*
cpe:2.3:a:apache:kylin:4.0.0:beta:*:*:*:*:*:*

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