How severe is CVE-2023-0289?

CVE-2023-0289 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-0289 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0289?

CVE-2023-0289 affects Webcalendar Project Webcalendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0289?

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

When was CVE-2023-0289 published?

CVE-2023-0289 was published on 2023-01-13 and last updated on 2026-06-17.

CVE-2023-0289

CVE-2023-0289 is a medium-severity vulnerability in Webcalendar Project Webcalendar with a CVSS 3.x base score of 5.4. 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 5.4)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Webcalendar Project Webcalendar
Published: 2023-01-13
Last modified: 2026-06-17

Description

Cross-site Scripting (XSS) - Stored in GitHub repository craigk5n/webcalendar prior to master.

Frequently asked questions

What is CVE-2023-0289?: Cross-site Scripting (XSS) - Stored in GitHub repository craigk5n/webcalendar prior to master.
How severe is CVE-2023-0289?: CVE-2023-0289 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-0289 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0289?: CVE-2023-0289 affects Webcalendar Project Webcalendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0289?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-0289 published?: CVE-2023-0289 was published on 2023-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:webcalendar_project:webcalendar:-:*:*:*:*:*:*:*

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