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CVE Record

CVE-2020-23015: An open redirect issue was discovered in OPNsense through 20.1.5.

An open redirect issue was discovered in OPNsense through 20.1.5. The redirect parameter "url" in login page was not filtered and can redirect user to any website.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

OPNsense through 20.1.5 had an open redirect on the login page. A crafted link could send a user from the legitimate login page to another website. This is mainly a phishing and trust-abuse risk, not evidence of direct system compromise.

Executive priority

Treat this as a moderate hygiene issue. It can support phishing against administrators or users, but the public sources do not show active exploitation or direct compromise capability.

Technical view

The CVE states the login page redirect parameter named "url" was not filtered and could redirect users to arbitrary websites. Public data provides no CVSS score, CWE, fixed version, exploit details, or proof of active exploitation.

Likely exposure

Exposure is likely limited to organizations running OPNsense through 20.1.5, especially where the login page is reachable by users or exposed beyond trusted networks.

Exploitation context

The source bundle does not show KEV listing or active exploitation. The plausible abuse is social engineering using trusted OPNsense URLs to redirect users elsewhere.

Researcher notes

Evidence is sparse. The only technical detail in the bundle is an unfiltered login-page "url" redirect parameter. Do not assume affected versions beyond OPNsense through 20.1.5 or a specific fixed release without vendor confirmation.

Mitigation direction

  • Check OPNsense vendor guidance for the fixed or recommended version.
  • Upgrade affected OPNsense systems to a supported release if applicable.
  • Limit access to OPNsense login interfaces to trusted networks.
  • Review phishing controls for links involving administrative portals.

Validation and detection

  • Inventory OPNsense deployments and confirm versions.
  • Identify whether any systems run OPNsense through 20.1.5.
  • Check whether login pages are reachable from untrusted networks.
  • Review logs or reports for suspicious login-page redirect activity.
Prepared
Confidence
medium
Sources
3

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

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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
2Source 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

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