How severe is CVE-2023-45889?

CVE-2023-45889 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-45889 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-45889?

CVE-2023-45889 affects Classlink Oneclick. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-45889?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-45889 have an EU (EUVD) identifier?

Yes. CVE-2023-45889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-50152.

When was CVE-2023-45889 published?

CVE-2023-45889 was published on 2024-01-23 and last updated on 2026-06-17.

CVE-2023-45889

CVE-2023-45889 is a medium-severity vulnerability in Classlink Oneclick with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-50152
Weakness: CWE-79
Affected product: Classlink Oneclick
Published: 2024-01-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-45889?: 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.
How severe is CVE-2023-45889?: CVE-2023-45889 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-45889 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-45889?: CVE-2023-45889 affects Classlink Oneclick. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-45889?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-45889 have an EU (EUVD) identifier?: Yes. CVE-2023-45889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-50152.
When was CVE-2023-45889 published?: CVE-2023-45889 was published on 2024-01-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:classlink:oneclick:*:*:*:*:*:*:*:*

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