Security readout for executives and security teams
Plain-English summary
KnowBe4 Security Awareness Training before 2020-01-10 had an open redirect. A KnowBe4 URL could redirect a visitor to another HTTPS site, making phishing or credential-collection pages appear more trustworthy. The record rates this medium severity and is not listed as CISA KEV exploited.
Executive priority
Treat as a moderate phishing-enablement risk. Prioritize confirmation during vulnerability management and phishing-control reviews, especially where KnowBe4 links are trusted by employees.
Technical view
CWE-601 open redirect in a redirect function that failed to validate the destination URL. The response used a SCRIPT element to set window.location.href to an arbitrary HTTPS URL. CVSS 3.1 is 5.3, network reachable, low complexity, no privileges required, with limited integrity impact.
Likely exposure
Exposure is most likely limited to organizations using KnowBe4 Security Awareness Training versions before 2020-01-10 or legacy links still reaching that vulnerable redirect behavior.
Exploitation context
The source bundle does not identify active exploitation, exploit code, or KEV listing. Abuse would mainly support phishing, brand impersonation, or user redirection rather than direct system compromise.
Researcher notes
Evidence is narrow: the CVE record and referenced write-up describe the redirect behavior and affected pre-2020-01-10 application. No source in the bundle provides detailed patch notes, broad product matrix, or active exploitation evidence.
Mitigation direction
- Confirm all KnowBe4 Security Awareness Training deployments are newer than 2020-01-10.
- Ask KnowBe4 support for current remediation guidance if legacy behavior remains reachable.
- Remove or replace legacy links that depend on vulnerable redirect endpoints.
- Monitor mail and web logs for KnowBe4 links redirecting to unexpected HTTPS destinations.
Validation and detection
- Inventory KnowBe4 SAT tenant or deployment versions and relevant legacy configurations.
- Review historical email templates and campaigns for old redirect URLs.
- Check security logs for KnowBe4 URLs followed by unexpected external destinations.
- Validate remediation against vendor guidance, not custom assumptions.
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.
CWE-601: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-36845 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.doyler.net/security-not-included/knowbe4-vulnerabilitiesCVE reference
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.
URL Redirection to Untrusted Site ('Open Redirect')
URL Redirection to Untrusted Site ('Open Redirect') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.