CVE-2021-42551

Public Exploit
Reflected XSS in NetBiblio WebOPAC search functionality

Description

Cross-site Scripting (XSS) vulnerability in the search functionality of AlCoda NetBiblio WebOPAC allows an unauthenticated user to craft a reflected Cross-Site Scripting attack. This issue affects: AlCoda NetBiblio WebOPAC versions prior to 4.0.0.320; versions later than 4.0.0.328. This issue does not affect: AlCoda NetBiblio WebOPAC version 4.0.0.335 and later versions.

Remediation

Solution:

  • Upgrade to 4.0.0.335 or later

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 8.58% Top 10%
Third-Party Advisory redguard.ch
Affected: AlCoda NetBiblio WebOPAC
Published at:
Updated at:

References

Link Tags
https://www.redguard.ch/advisories/netbiblio_webopac.txt third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-42551?
CVE-2021-42551 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42551?
To fix CVE-2021-42551: Upgrade to 4.0.0.335 or later
Is CVE-2021-42551 being actively exploited in the wild?
It is possible that CVE-2021-42551 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~9% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-42551?
CVE-2021-42551 affects AlCoda NetBiblio WebOPAC.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.