Security readout for executives and security teams
Plain-English summary
Octopus Server had an authenticated SQL injection flaw in the Events REST API. A logged-in user could potentially make the server query database tables in unintended ways, risking unauthorized database access. Public evidence provided does not show active exploitation or a CVSS score.
Executive priority
Treat as high priority if Octopus Server manages production deployments or secrets. The issue requires authentication, but database access impact can be significant in deployment platforms.
Technical view
CVE-2021-31818 affects Octopus Server. The Events REST API did not correctly parameterize user-supplied request data, creating an authenticated SQL injection issue. The CVE states exploitation could allow unauthorized access to database tables. Affected version data in the bundle is incomplete and should be confirmed against Octopus guidance.
Likely exposure
Organizations running Octopus Server versions identified by Octopus as affected, especially where many users can authenticate to the Events REST API, may be exposed.
Exploitation context
The source bundle says exploitation requires authentication. CISA KEV status is false, and the provided sources do not claim active exploitation, public weaponization, or unauthenticated attack paths.
Researcher notes
Key unknowns are exact fixed versions, CVSS scoring, and exploit maturity. The affected version range in the bundle appears incomplete, so validation should rely on Octopus advisory details rather than assumptions.
Mitigation direction
- Review the Octopus advisory for affected and fixed version guidance.
- Upgrade Octopus Server according to vendor guidance where affected.
- Identify and reduce unnecessary authenticated access to Octopus Server.
- Prioritize environments where Octopus stores sensitive deployment or infrastructure data.
Validation and detection
- Inventory all Octopus Server instances and record exact versions.
- Compare versions against the Octopus advisory and CVE record.
- Review Events REST API access by unusual or unnecessary accounts.
- Confirm remediation by documenting upgrade status or vendor-approved compensating controls.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Database behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-31818 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://advisories.octopus.com/adv/2021-04---SQL-Injection-in-the-Events-REST-API-%28CVE-2021-31818%29.2013233248.htmlCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.