CVE-2021-42838

Name: CVE-2021-42838
Creator: NVD / NIST
Published: 2021-11-15T10:15:07.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2021-42838 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Grand Vice info Co. webopac7 book search field parameter does not properly restrict the input of special characters, thus unauthenticated attackers can inject JavaScript syntax remotely, and further perform reflective XSS attacks.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

Grand Vice info Co. webopac7 book search field parameter does not properly restrict the input of special characters, thus unauthenticated attackers can inject JavaScript syntax remotely, and further perform reflective XSS attacks.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.61%

44.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Vice	Webopac	1.8.20160701
Vice	Webopac	7.1.20160701

References

https://www.twcert.org.tw/tw/cp-132-5286-b92c8-1.htmlThird Party Advisory
https://www.twcert.org.tw/tw/cp-132-5286-b92c8-1.htmlThird Party Advisory

Timeline

Published: Nov 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42838?

How severe is CVE-2021-42838?

CVE-2021-42838 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42838?

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-2021-42838?

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

Scan your code now

Source: NVD / NIST