CVE-2021-42839
HIGHCVSS 8.8/10EPSS 2.35%
Last modified
CVE-2021-42839 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Grand Vice info Co. webopac7 file upload function fails to filter special characters. EPSS estimates a 2.35% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Vice | Webopac | 1.8.20160701 |
| Vice | Webopac | 7.1.20160701 |
References
- https://www.twcert.org.tw/tw/cp-132-5288-9d546-1.htmlThird Party Advisory
- https://www.twcert.org.tw/tw/cp-132-5288-9d546-1.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42839?
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.
How severe is CVE-2021-42839?
CVE-2021-42839 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.35% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42839?
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-2021-42839?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST