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CVE Record

CVE-2021-31216: Siren Investigate before 11.1.1 contains a server side request forgery (SSRF) defect in the built-in image...

Siren Investigate before 11.1.1 contains a server side request forgery (SSRF) defect in the built-in image proxy route (which is enabled by default). An attacker with access to the Investigate installation can specify an arbitrary URL in the parameters of the image proxy route and fetch external URLs as the Investigate process on the host.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Siren Investigate versions before 11.1.1 had a default-enabled image proxy flaw. A logged-in or otherwise permitted user could make the server fetch a URL of their choice. This can matter if the server can reach internal systems or sensitive metadata endpoints that the user cannot reach directly.

Executive priority

Prioritize remediation if Siren Investigate is still in use, especially in environments with sensitive internal services reachable from the application host. The urgency is lower than a confirmed exploited vulnerability, but SSRF can create meaningful internal exposure.

Technical view

CVE-2021-31216 is an SSRF in Siren Investigate's built-in image proxy route. The route accepted arbitrary URL parameters and fetched external URLs from the Investigate host process. The source bundle does not provide CVSS, CWE, detailed prerequisites beyond access to the installation, or confirmed exploit activity.

Likely exposure

Exposure is most likely where Siren Investigate before 11.1.1 remains deployed and users or attackers can access the Investigate installation. Internet exposure is not stated in the sources; the key condition is access to the affected application route.

Exploitation context

The CVE source describes arbitrary URL fetching through the image proxy, but does not cite public exploitation, exploit code, or CISA KEV listing. Treat this as a plausible SSRF risk, especially in networks where the application host has privileged outbound reach.

Researcher notes

Evidence is limited to the CVE description and Siren reference links. The record states default-enabled SSRF before 11.1.1 and attacker access to the installation, but does not provide CVSS, affected CPEs, request details, or vendor mitigation text in the bundle.

Mitigation direction

  • Identify all Siren Investigate deployments and confirm installed versions.
  • Upgrade affected deployments to 11.1.1 or later per vendor guidance.
  • Review Siren release notes and announcements for vendor-specific remediation details.
  • Restrict access to Investigate to trusted users and networks.
  • Limit outbound server access to internal metadata and management endpoints.

Validation and detection

  • Check whether any deployment runs Siren Investigate before 11.1.1.
  • Confirm whether the built-in image proxy route is reachable.
  • Review logs for unusual image proxy requests to unexpected URLs.
  • Assess what internal services the Investigate host can reach outbound.
  • Verify post-upgrade version and route behavior against vendor guidance.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

Cloud metadata behavior lookup

The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-31216 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.