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Critical, CVSS 9.8amended

SQL Injection in Apache SkyWalking

CVE-2020-13921GHSA-grpf-gg7v-5g5h

What to do

Partial vendor fix. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI apache-skywalking

    Affected
    every version
    Fixed in
    no fixed version recorded

  • Maven org.apache.skywalking:oap-server

    Affected
    < 8.1.0
    Fixed in
    8.1.0

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2020-13921: 33.48% estimated exploitation activity in the next 30 days; percentile 98.38 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-grpf-gg7v-5g5h

  2. Revision 1 · created ·

    Published from osv record PYSEC-2020-342

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2020-13921

Advisory: SQL Injection in Apache SkyWalking
IDs: CVE-2020-13921, GHSA-grpf-gg7v-5g5h
Record: https://patchnext.com/advisories/cve-2020-13921 (revision 2, source checked 26 Oct 2026, 16:16 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: org.apache.skywalking:oap-server 8.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI apache-skywalking: affected every version
- Maven org.apache.skywalking:oap-server: affected < 8.1.0; fixed in 8.1.0

## Suggested inspection (read-only)
- `python -m pip show apache-skywalking`: prints the installed version. Run with the environment that serves production active.
- Maven org.apache.skywalking:oap-server: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on apache-skywalking, org.apache.skywalking:oap-server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/PYSEC-2020-342 (OSV record PYSEC-2020-342 lists affected ranges: PyPI apache-skywalking >=0)
- Verified: https://github.com/advisories/GHSA-grpf-gg7v-5g5h (GitHub-reviewed advisory GHSA-grpf-gg7v-5g5h lists affected ranges: Maven org.apache.skywalking:oap-server >=0 <8.1.0)

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