CVE-2020-13921

CRITICALNVD 9.89.8—

9.8

Resolved Only when using H2/MySQL/TiDB as Apache SkyWalking storage, there is a SQL injection vulnerability in the wildcard query cases.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 89.3%
KEV: Not listed

Published

August 5, 2020

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated May 27, 2026

⚠️ Active exploitation confirmed. Upstream fix merged — awaiting tagged release. Sources: github_pr.

generic

https://lists.apache.org/thread.html/r6f3a934ebc54585d8468151a494c1919dc1ee2cccaf237ec434dbbd6%40%3Cdev.skywalking.apache.org%3E

github_pr

fix fuzzy query sql injection

Fix merged in apache/skywalking PR #4970 on 2020-06-26 — awaiting tagged release

https://github.com/apache/skywalking/pull/4970

generic🔴 Active Exploitation

oss-security - [CVE-2020-13921] Apache SkyWalking SQL injection vulnerability after H2/MySQL/TiDB storage option activated.

http://www.openwall.com/lists/oss-security/2020/08/05/3

Affected Packages

(2 across 2 ecosystems)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.apache.skywalking:oap-server	6.0.0-GA ... 8.0.1 (12 versions)	8.1.0	—

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
apache-skywalking	0.1.0 ... 1.2.0 (12 versions)	—	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-89SQL Injection

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore

Frequently asked(5)

What is CVE-2020-13921?

CVE-2020-13921 is a critical vulnerability published on August 5, 2020. Resolved Only when using H2/MySQL/TiDB as Apache SkyWalking storage, there is a SQL injection vulnerability in the wildcard query cases.

When was CVE-2020-13921 disclosed?

CVE-2020-13921 was first published in the National Vulnerability Database on August 5, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-13921 actively exploited?

CVE-2020-13921 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-13921?

CVE-2020-13921 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-13921?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-13921, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-13921

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CVE-2020-13921

📅 Published

🔄 Last Modified

📋 Advisory Details (3)