CVE-2021-31818Network attack vector

Database-table disclosure via unparameterized Events query

Published Jun 17, 2021 · Updated Aug 3, 2024

SQL injection in the Events REST API in Octopus Server allows remote authenticated users to read database tables through crafted API input. The API incorporates user-supplied request data into database queries without parameter binding, allowing that data to alter SQL syntax. Exploitation requires an authenticated account with EventView permission and exposes database-table contents without granting write access.

CVSS severity4.3
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in the Events REST API in Octopus Server allows remote authenticated users to read database tables through crafted API input. The API incorporates user-supplied request data into database queries without parameter binding, allowing that data to alter SQL syntax. Exploitation requires an authenticated account with EventView permission and exposes database-table contents without granting write access.

The record

CVE
CVE-2021-31818
Published
Jun 17, 2021
Updated
Aug 3, 2024
Vendor
Octopus Deploy
Product
Octopus Server
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2018.9.17 <unspecified
  2. Affected versionversion=2021.1.7149 <unspecified
  3. Affected versionversion=unspecified <2020.6.5146
  4. Affected versionversion=unspecified <2021.1.7316

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Octopus Deploy · Octopus Serverversion=2018.9.17 <unspecified; version=2021.1.7149 <unspecified; version=unspecified <2020.6.5146; version=unspecified <2021.1.7316

Published CVSS scores

4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NVDAV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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