CVE-2023-45889: A Universal Cross Site Scripting (UXSS) vulnerability in ClassLink OneClick Extension through 10.8 allows remo

Q: How do I fix CVE-2023-45889?

oneclick: upgrade to newer than 10.8. Exact commands for each OS are on this page.

Q: Is CVE-2023-45889 being exploited?

CVE-2023-45889 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-45889 affect?

CVE-2023-45889 affects oneclick. Severity is medium (CVSS 6.1). 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.

Q: How urgent is CVE-2023-45889?

Priority 36/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2023-45889 is a medium-severity flaw (CVSS 6.1) affecting oneclick. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-01-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: classlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-01-23 18:15 UTCPublished CVE record published
2026-06-17 06:29 UTCUpdated Record last modified

classlink oneclick UPGRADE

Affected: <= 10.8

Fixed in: newer than 10.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy oneclick || rpm -q oneclick || oneclick --version

2. UPGRADE to newer than 10.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade oneclick

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade oneclick

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-45889?

oneclick: upgrade to newer than 10.8. Exact commands for each OS are on this page.

Is CVE-2023-45889 being exploited?

CVE-2023-45889 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-45889 affect?

CVE-2023-45889 affects oneclick. Severity is medium (CVSS 6.1). 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 urgent is CVE-2023-45889?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2022-48612 MEDIUM 6.1 UPGRADE A Universal Cross Site Scripting (UXSS) vulnerability in ClassLink OneClick Extension through 10.7 allows remo

References

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