CVE-2021-35966Network attack vector

Unauthenticated phishing redirects via unfiltered parameters

Published Jul 19, 2021 · Updated Sep 16, 2024

Open redirect in Learning Digital Orca HCM 10.0 and earlier allows remote attackers to redirect users to arbitrary sites via crafted links. TWCERT/CC has not named the affected function or parameter; it reports that the function fails to filter an input parameter before using it as a redirect destination. No authentication is required, but a user must follow the crafted link, after which the trusted Orca HCM origin can deliver the user to a phishing site.

CVSS severity6.1
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Learning Digital Orca HCM 10.0 and earlier allows remote attackers to redirect users to arbitrary sites via crafted links. TWCERT/CC has not named the affected function or parameter; it reports that the function fails to filter an input parameter before using it as a redirect destination. No authentication is required, but a user must follow the crafted link, after which the trusted Orca HCM origin can deliver the user to a phishing site.

The record

CVE
CVE-2021-35966
Published
Jul 19, 2021
Updated
Sep 16, 2024
Vendor
Learning Digital
Product
Orca HCM
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Learning Digital · Orca HCMversion=unspecified <=10.0

Published CVSS scores

6.1TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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