How severe is CVE-2021-35963?

CVE-2021-35963 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35963?

CVE-2021-35963 affects Learningdigital Orca Hcm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-35963 published?

CVE-2021-35963 was published on 2021-07-19 and last updated on 2026-06-17.

CVE-2021-35963

CVE-2021-35963 is a critical-severity vulnerability in Learningdigital Orca Hcm with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Learningdigital Orca Hcm
Published: 2021-07-19
Last modified: 2026-06-17

Description

The specific parameter of upload function of the Orca HCM digital learning platform does not filter file format, which allows remote unauthenticated attackers to upload files containing malicious script to execute RCE attacks.

Frequently asked questions

What is CVE-2021-35963?: The specific parameter of upload function of the Orca HCM digital learning platform does not filter file format, which allows remote unauthenticated attackers to upload files containing malicious script to execute RCE attacks.
How severe is CVE-2021-35963?: CVE-2021-35963 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-35963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35963?: CVE-2021-35963 affects Learningdigital Orca Hcm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-35963 published?: CVE-2021-35963 was published on 2021-07-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:learningdigital:orca_hcm:*:*:*:*:*:*:*:*

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