CVE-2021-35963

Name: CVE-2021-35963
Creator: NVD / NIST
Published: 2021-07-19T12:15:08.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.41%

Last modified Jun 17, 2026

CVE-2021-35963 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.41% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.41%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Learningdigital	Orca Hcm	<= 10.0

References

https://www.chtsecurity.com/news/ba7b3ae7-14f3-4970-b3f6-4d97d8c7ea25Third Party Advisory
https://www.twcert.org.tw/tw/cp-132-4923-d68e6-1.htmlThird Party Advisory
https://www.chtsecurity.com/news/ba7b3ae7-14f3-4970-b3f6-4d97d8c7ea25Third Party Advisory
https://www.twcert.org.tw/tw/cp-132-4923-d68e6-1.htmlThird Party Advisory

Timeline

Published: Jul 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-35963?

How severe is CVE-2021-35963?

CVE-2021-35963 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.41% probability of exploitation in the next 30 days.

How do I fix CVE-2021-35963?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-35963?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST