CVE-2023-45889

Name: CVE-2023-45889
Creator: NVD / NIST
Published: 2024-01-23T18:15:18.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2023-45889 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A Universal Cross Site Scripting (UXSS) vulnerability in ClassLink OneClick Extension through 10.8 allows remote attackers to inject JavaScript into any webpage. NOTE: this issue exists because of an incomplete fix for CVE-2022-48612.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

A Universal Cross Site Scripting (UXSS) vulnerability in ClassLink OneClick Extension through 10.8 allows remote attackers to inject JavaScript into any webpage. NOTE: this issue exists because of an incomplete fix for CVE-2022-48612.

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

0.45%

35.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Classlink	Oneclick	<= 10.8

References

https://blog.zerdle.net/classlink/Third Party Advisory
https://blog.zerdle.net/classlink2/Exploit, Third Party Advisory
https://blog.zerdle.net/classlink/Third Party Advisory
https://blog.zerdle.net/classlink2/Exploit, Third Party Advisory

Timeline

Published: Jan 23, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45889?

How severe is CVE-2023-45889?

CVE-2023-45889 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45889?

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-2023-45889?

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

Scan your code now

Source: NVD / NIST