How severe is CVE-2023-42343?

CVE-2023-42343 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-2023-42343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-42343?

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

Does CVE-2023-42343 have an EU (EUVD) identifier?

Yes. CVE-2023-42343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46796.

When was CVE-2023-42343 published?

CVE-2023-42343 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2023-42343

CVE-2023-42343 is a medium-severity vulnerability 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: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-46796
Weakness: CWE-79
Published: 2026-05-08
Last modified: 2026-06-17

Description

A Cross Site Scripting vulnerability in Alkacon OpenCms before 10.5.1 exists via cmis-online/type.

Frequently asked questions

What is CVE-2023-42343?: A Cross Site Scripting vulnerability in Alkacon OpenCms before 10.5.1 exists via cmis-online/type.
How severe is CVE-2023-42343?: CVE-2023-42343 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-2023-42343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-42343?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-42343 have an EU (EUVD) identifier?: Yes. CVE-2023-42343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46796.
When was CVE-2023-42343 published?: CVE-2023-42343 was published on 2026-05-08 and last updated on 2026-06-17.

References

https://labs.watchtowr.com/xxe-you-can-depend-on-me-opencms/

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