CVE-2021-42839

8.8 highEPSS 2.4%

High (8.8) in vice webopac. EPSS 2.4% chance of exploitation in the next 30 days.

Grand Vice info Co. webopac7 file upload function fails to filter special characters. While logging in with general user’s permission, remote attackers can upload malicious script and execute arbitrary code to control the system or interrupt services.

Severity

CVSS 3.1

8.8 high

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

EPSS: 2.4% chance of exploitation in the next 30 days; higher than 84% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2021-11-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

vice:webopac

References

https://www.twcert.org.tw/tw/cp-132-5288-9d546-1.html
https://www.twcert.org.tw/tw/cp-132-5288-9d546-1.html

Check your stack JSON