CVE-2021-31522

highpriority · track · 40EPSS 0.029 · 87 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.90% (87th) EPSS

CVSS 7.5 · high

Is it mine?

12 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Kylin can receive user input and load any class through Class.forName(...). 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.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-470USprimaryCWE-470USCWE-470US

affected products (12)

Products and version ranges known to be affected.

Apache Software Foundation Apache Kylin≤ Apache Kylin 2 ≤2.6.6enisa_euvdEU
Apache Software Foundation Apache Kylin≤ Apache Kylin 3 ≤3.1.2enisa_euvdEU
Apache Software Foundation Apache Kylin≤ Apache Kylin 4 ≤4.0.0enisa_euvdEU
Apache Software Foundation Kylin≤ 4.0.0betafstec_bduRU
Apache Software Foundation Kylin≤ 4.0.0alphafstec_bduRU
Apache Software Foundation Kylin2.0.0 → 2.6.6fstec_bduRU
Apache Software Foundation Kylin3.0.0 → 3.1.3fstec_bduRU
apache kylin2.0.0 → 2.6.6nvdUScpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*
apache kylin3.0.0 → 3.1.3nvdUScpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*
apache kylin= 4.0.0nvdUScpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*
Maven org.apache.kylin:kylin< 3.1.3osvUSpkg:maven/org.apache.kylin/kylin
Maven org.apache.kylin:kylin4.0.0 → 4.0.1osvUSpkg:maven/org.apache.kylin/kylin

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-q656-g2x3-8cghKylin can receive user input and load any class through Class.forName(...).2022-01-08ghsa · osvUS
Kylin can receive user input and load any class through Class.forName(...). 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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2022-01-06modified 2026-06-17

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+146 more

references (8)

External citations — patches, advisories, analysis.

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