Security readout for executives and security teams
Plain-English summary
CVE-2021-35966 is an open redirect flaw in Learningdigital.com Orca HCM. A malicious link using the trusted Orca HCM domain could send a user to an attacker-controlled site, enabling phishing. The issue requires user interaction and is not listed in CISA KEV.
Executive priority
Treat this as a moderate phishing-enablement risk. It is unlikely to cause direct system compromise by itself, but trusted HR or learning portals can make credential theft more convincing. Prioritize confirmation and vendor-guided remediation if Orca HCM is in use.
Technical view
The source bundle describes improper filtering of input parameters in a specific Orca HCM platform function, allowing URL redirection to arbitrary websites. It maps to CWE-601 with CVSS 3.1 score 6.1: network exploitable, low complexity, no privileges, user interaction required, changed scope, low confidentiality and integrity impact.
Likely exposure
Exposure is limited to organizations using Learningdigital.com Orca HCM. The affected versions are unspecified in the provided sources, so vulnerability managers should not assume a deployment is safe based on version alone without vendor confirmation.
Exploitation context
The documented abuse case is phishing through a crafted trusted-domain link. The bundle does not provide evidence of active exploitation, public exploit availability, or CISA KEV listing. User interaction is required.
Researcher notes
Evidence is sparse: the bundle identifies the product, weakness class, CVSS vector, and phishing impact, but not affected versions, exact endpoint, patch status, or exploit telemetry. Avoid broad claims beyond Orca HCM and validate scope through vendor or CERT materials.
Mitigation direction
- Check Learningdigital.com or CERT guidance for affected versions, patches, or workarounds.
- Prioritize remediation for internet-facing Orca HCM instances and login-related workflows.
- Add or verify phishing detection for suspicious Orca HCM redirect links.
- Monitor web logs for unusual redirect parameters, destinations, and referrers.
- Educate users to verify final destinations before entering credentials.
Validation and detection
- Inventory all Orca HCM deployments and externally reachable routes.
- Confirm deployed version and mitigation status with vendor or administrator records.
- Review application logs for unexpected external redirect destinations.
- Validate redirect handling only in an authorized, controlled test environment.
- Confirm email and web gateways detect suspicious Orca HCM redirect URLs.
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-2021-35966 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
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.chtsecurity.com/news/ba7b3ae7-14f3-4970-b3f6-4d97d8c7ea25CVE reference · x_refsource_MISC
- https://www.twcert.org.tw/tw/cp-132-4926-dc06b-1.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.
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.